diff --git a/example/generator/src/SinewaveTelemetrySeries.js b/example/generator/src/SinewaveTelemetrySeries.js
index fa47f8f59a..8643b0429b 100644
--- a/example/generator/src/SinewaveTelemetrySeries.js
+++ b/example/generator/src/SinewaveTelemetrySeries.js
@@ -62,7 +62,7 @@ define(
                 // so it's not checked for here, just formatted for display
                 // differently.
                 return (i + offset) * 1000 + firstTime * 1000 -
-                    (domain === 'yesterday' ? ONE_DAY : 0);
+                    (domain === 'yesterday' ? (ONE_DAY * 1000) : 0);
             };
 
             generatorData.getRangeValue = function (i, range) {
diff --git a/platform/core/bundle.json b/platform/core/bundle.json
index 3e1fcbd4d3..911678d5f4 100644
--- a/platform/core/bundle.json
+++ b/platform/core/bundle.json
@@ -97,7 +97,7 @@
                 "provides": "actionService",
                 "type": "provider",
                 "implementation": "actions/ActionProvider.js",
-                "depends": [ "actions[]" ]
+                "depends": [ "actions[]", "$log" ]
             },
             {
                 "provides": "actionService",
diff --git a/platform/core/src/actions/ActionProvider.js b/platform/core/src/actions/ActionProvider.js
index dcb17eb6ce..b16db2e52a 100644
--- a/platform/core/src/actions/ActionProvider.js
+++ b/platform/core/src/actions/ActionProvider.js
@@ -39,9 +39,11 @@ define(
          * @imeplements {ActionService}
          * @constructor
          */
-        function ActionProvider(actions) {
+        function ActionProvider(actions, $log) {
             var self = this;
 
+            this.$log = $log;
+
             // Build up look-up tables
             this.actions = actions;
             this.actionsByKey = {};
@@ -74,6 +76,7 @@ define(
             var context = (actionContext || {}),
                 category = context.category,
                 key = context.key,
+                $log = this.$log,
                 candidates;
 
             // Instantiate an action; invokes the constructor and
@@ -103,12 +106,31 @@ define(
             // appliesTo method of given actions (if defined), and
             // instantiate those applicable actions.
             function createIfApplicable(actions, context) {
-                return (actions || []).filter(function (Action) {
-                    return Action.appliesTo ?
-                        Action.appliesTo(context) : true;
-                }).map(function (Action) {
-                    return instantiateAction(Action, context);
-                });
+                function isApplicable(Action) {
+                    return Action.appliesTo ? Action.appliesTo(context) : true;
+                }
+
+                function instantiate(Action) {
+                    try {
+                        return instantiateAction(Action, context);
+                    } catch (e) {
+                        $log.error([
+                            "Could not instantiate action",
+                            Action.key,
+                            "due to:",
+                            e.message
+                        ].join(" "));
+                        return undefined;
+                    }
+                }
+
+                function isDefined(action) {
+                    return action !== undefined;
+                }
+
+                return (actions || []).filter(isApplicable)
+                    .map(instantiate)
+                    .filter(isDefined);
             }
 
             // Match actions to the provided context by comparing "key"
diff --git a/platform/core/src/types/TypeImpl.js b/platform/core/src/types/TypeImpl.js
index 1a9854ea74..333f37663f 100644
--- a/platform/core/src/types/TypeImpl.js
+++ b/platform/core/src/types/TypeImpl.js
@@ -156,6 +156,13 @@ define(
             });
         };
 
+        /**
+         * Returns the default model for an object of this type. Note that
+         * this method returns a clone of the original model, so if using this
+         * method heavily, consider caching the result to optimize performance.
+         *
+         * @return {object} The default model for an object of this type.
+         */
         TypeImpl.prototype.getInitialModel = function () {
             return JSON.parse(JSON.stringify(this.typeDef.model || {}));
         };
diff --git a/platform/core/test/actions/ActionProviderSpec.js b/platform/core/test/actions/ActionProviderSpec.js
index f059052139..14c719f0c2 100644
--- a/platform/core/test/actions/ActionProviderSpec.js
+++ b/platform/core/test/actions/ActionProviderSpec.js
@@ -30,7 +30,8 @@ define(
         "use strict";
 
         describe("The action provider", function () {
-            var actions,
+            var mockLog,
+                actions,
                 actionProvider;
 
             function SimpleAction() {
@@ -62,6 +63,10 @@ define(
             MetadataAction.key = "metadata";
 
             beforeEach(function () {
+                mockLog = jasmine.createSpyObj(
+                    '$log',
+                    ['error', 'warn', 'info', 'debug']
+                );
                 actions = [
                     SimpleAction,
                     CategorizedAction,
@@ -137,6 +142,42 @@ define(
                 expect(provided[0].getMetadata()).toEqual("custom metadata");
             });
 
+            describe("when actions throw errors during instantiation", function () {
+                var errorText,
+                    provided;
+
+                beforeEach(function () {
+                    errorText = "some error text";
+
+                    function BadAction() {
+                        throw new Error(errorText);
+                    }
+
+                    provided = new ActionProvider(
+                        [ SimpleAction, BadAction ],
+                        mockLog
+                    ).getActions();
+                });
+
+                it("logs an error", function () {
+                    expect(mockLog.error)
+                        .toHaveBeenCalledWith(jasmine.any(String));
+                });
+
+                it("reports the error's message", function () {
+                    expect(
+                        mockLog.error.mostRecentCall.args[0].indexOf(errorText)
+                    ).not.toEqual(-1);
+                });
+
+                it("still provides valid actions", function () {
+                    expect(provided.length).toEqual(1);
+                    expect(provided[0].perform()).toEqual("simple");
+                });
+
+            });
+
+
         });
     }
-);
\ No newline at end of file
+);
diff --git a/platform/core/test/types/TypeImplSpec.js b/platform/core/test/types/TypeImplSpec.js
index f0a89875b3..0203058934 100644
--- a/platform/core/test/types/TypeImplSpec.js
+++ b/platform/core/test/types/TypeImplSpec.js
@@ -102,6 +102,8 @@ define(
             });
 
             it("provides a fresh initial model each time", function () {
+                var model = type.getInitialModel();
+                model.someKey = "some other value";
                 expect(type.getInitialModel().someKey).toEqual("some value");
             });
 
diff --git a/platform/entanglement/src/actions/AbstractComposeAction.js b/platform/entanglement/src/actions/AbstractComposeAction.js
index f68391adc9..ef56c952b3 100644
--- a/platform/entanglement/src/actions/AbstractComposeAction.js
+++ b/platform/entanglement/src/actions/AbstractComposeAction.js
@@ -122,6 +122,14 @@ define(
             });
         };
 
+        AbstractComposeAction.appliesTo = function (context) {
+            var applicableObject =
+                context.selectedObject || context.domainObject;
+
+            return !!(applicableObject &&
+                applicableObject.hasCapability('context'));
+        };
+
         return AbstractComposeAction;
     }
 );
diff --git a/platform/entanglement/src/actions/CopyAction.js b/platform/entanglement/src/actions/CopyAction.js
index cdcefeb935..161db1ce27 100644
--- a/platform/entanglement/src/actions/CopyAction.js
+++ b/platform/entanglement/src/actions/CopyAction.js
@@ -34,7 +34,7 @@ define(
          * @constructor
          * @memberof platform/entanglement
          */
-        function CopyAction($log, locationService, copyService, dialogService, 
+        function CopyAction($log, locationService, copyService, dialogService,
                             notificationService, context) {
             this.dialog = undefined;
             this.notification = undefined;
@@ -42,7 +42,7 @@ define(
             this.notificationService = notificationService;
             this.$log = $log;
             //Extend the behaviour of the Abstract Compose Action
-            AbstractComposeAction.call(this, locationService, copyService, 
+            AbstractComposeAction.call(this, locationService, copyService,
                 context, "Duplicate", "to a location");
         }
 
@@ -87,8 +87,8 @@ define(
         };
 
         /**
-         * Executes the CopyAction. The CopyAction uses the default behaviour of 
-         * the AbstractComposeAction, but extends it to support notification 
+         * Executes the CopyAction. The CopyAction uses the default behaviour of
+         * the AbstractComposeAction, but extends it to support notification
          * updates of progress on copy.
          */
         CopyAction.prototype.perform = function() {
@@ -131,6 +131,9 @@ define(
             return AbstractComposeAction.prototype.perform.call(this)
                 .then(success, error, notification);
         };
+
+        CopyAction.appliesTo = AbstractComposeAction.appliesTo;
+
         return CopyAction;
     }
 );
diff --git a/platform/entanglement/src/actions/LinkAction.js b/platform/entanglement/src/actions/LinkAction.js
index c791310886..f34e91f156 100644
--- a/platform/entanglement/src/actions/LinkAction.js
+++ b/platform/entanglement/src/actions/LinkAction.js
@@ -35,14 +35,15 @@ define(
          * @memberof platform/entanglement
          */
         function LinkAction(locationService, linkService, context) {
-            return new AbstractComposeAction(
-                locationService,
-                linkService,
-                context,
-                "Link"
+            AbstractComposeAction.apply(
+                this,
+                [locationService, linkService, context, "Link"]
             );
         }
 
+        LinkAction.prototype = Object.create(AbstractComposeAction.prototype);
+        LinkAction.appliesTo = AbstractComposeAction.appliesTo;
+
         return LinkAction;
     }
 );
diff --git a/platform/entanglement/src/actions/MoveAction.js b/platform/entanglement/src/actions/MoveAction.js
index 4fdd4b59df..1d090ce313 100644
--- a/platform/entanglement/src/actions/MoveAction.js
+++ b/platform/entanglement/src/actions/MoveAction.js
@@ -35,14 +35,16 @@ define(
          * @memberof platform/entanglement
          */
         function MoveAction(locationService, moveService, context) {
-            return new AbstractComposeAction(
-                locationService,
-                moveService,
-                context,
-                "Move"
+            AbstractComposeAction.apply(
+                this,
+                [locationService, moveService, context, "Move"]
             );
+
         }
 
+        MoveAction.prototype = Object.create(AbstractComposeAction.prototype);
+        MoveAction.appliesTo = AbstractComposeAction.appliesTo;
+
         return MoveAction;
     }
 );
diff --git a/platform/entanglement/test/actions/AbstractComposeActionSpec.js b/platform/entanglement/test/actions/AbstractComposeActionSpec.js
index 5be0604ec3..6a0ddd7ebd 100644
--- a/platform/entanglement/test/actions/AbstractComposeActionSpec.js
+++ b/platform/entanglement/test/actions/AbstractComposeActionSpec.js
@@ -94,6 +94,28 @@ define(
                 composeService = new MockCopyService();
             });
 
+            it("are only applicable to domain objects with a context", function () {
+                var noContextObject = domainObjectFactory({
+                    name: 'selectedObject',
+                    model: { name: 'selectedObject' },
+                    capabilities: {}
+                });
+
+                expect(AbstractComposeAction.appliesTo({
+                    selectedObject: selectedObject
+                })).toBe(true);
+                expect(AbstractComposeAction.appliesTo({
+                    domainObject: selectedObject
+                })).toBe(true);
+
+                expect(AbstractComposeAction.appliesTo({
+                    selectedObject: noContextObject
+                })).toBe(false);
+                expect(AbstractComposeAction.appliesTo({
+                    domainObject: noContextObject
+                })).toBe(false);
+            });
+
 
             describe("with context from context-action", function () {
                 beforeEach(function () {
diff --git a/platform/features/plot/src/PlotController.js b/platform/features/plot/src/PlotController.js
index cf6bfcf581..4789f4c682 100644
--- a/platform/features/plot/src/PlotController.js
+++ b/platform/features/plot/src/PlotController.js
@@ -78,6 +78,8 @@ define(
                 cachedObjects = [],
                 updater,
                 lastBounds,
+                lastRange,
+                lastDomain,
                 handle;
 
             // Populate the scope with axis information (specifically, options
@@ -120,16 +122,16 @@ define(
             // Reinstantiate the plot updater (e.g. because we have a
             // new subscription.) This will clear the plot.
             function recreateUpdater() {
-                updater = new PlotUpdater(
-                    handle,
-                    ($scope.axes[0].active || {}).key,
-                    ($scope.axes[1].active || {}).key,
-                    PLOT_FIXED_DURATION
-                );
-                self.limitTracker = new PlotLimitTracker(
-                    handle,
-                    ($scope.axes[1].active || {}).key
-                );
+                var domain = $scope.axes[0].active.key,
+                    range = $scope.axes[1].active.key,
+                    duration = PLOT_FIXED_DURATION;
+
+                updater = new PlotUpdater(handle, domain, range, duration);
+                lastDomain = domain;
+                lastRange = range;
+
+                self.limitTracker = new PlotLimitTracker(handle, range);
+
                 // Keep any externally-provided bounds
                 if (lastBounds) {
                     setBasePanZoom(lastBounds);
@@ -201,22 +203,39 @@ define(
                 }
             }
 
+            function requery() {
+                self.pending = true;
+                releaseSubscription();
+                subscribe($scope.domainObject);
+            }
+
+            function updateDomainFormat() {
+                var domainAxis = $scope.axes[0];
+                plotTelemetryFormatter
+                    .setDomainFormat(domainAxis.active.format);
+            }
+
+            function domainRequery(newDomain) {
+                if (newDomain !== lastDomain) {
+                    updateDomainFormat();
+                    requery();
+                }
+            }
+
+            function rangeRequery(newRange) {
+                if (newRange !== lastRange) {
+                    requery();
+                }
+            }
+
             // Respond to a display bounds change (requery for data)
             function changeDisplayBounds(event, bounds) {
                 var domainAxis = $scope.axes[0];
 
                 domainAxis.chooseOption(bounds.domain);
-                plotTelemetryFormatter
-                    .setDomainFormat(domainAxis.active.format);
-
-                self.pending = true;
-                releaseSubscription();
-                subscribe($scope.domainObject);
+                updateDomainFormat();
                 setBasePanZoom(bounds);
-            }
-
-            function updateDomainFormat(format) {
-                plotTelemetryFormatter.setDomainFormat(format);
+                requery();
             }
 
             this.modeOptions = new PlotModeOptions([], subPlotFactory);
@@ -237,6 +256,10 @@ define(
                 new PlotAxis("ranges", [], AXIS_DEFAULTS[1])
             ];
 
+            // Watch for changes to the selected axis
+            $scope.$watch("axes[0].active.key", domainRequery);
+            $scope.$watch("axes[1].active.key", rangeRequery);
+
             // Subscribe to telemetry when a domain object becomes available
             $scope.$watch('domainObject', subscribe);
 
diff --git a/platform/features/plot/test/PlotControllerSpec.js b/platform/features/plot/test/PlotControllerSpec.js
index addbdf5032..8edab2fc6d 100644
--- a/platform/features/plot/test/PlotControllerSpec.js
+++ b/platform/features/plot/test/PlotControllerSpec.js
@@ -53,6 +53,14 @@ define(
                 });
             }
 
+            function fireWatch(expr, value) {
+                mockScope.$watch.calls.forEach(function (call) {
+                    if (call.args[0] === expr) {
+                        call.args[1].apply(null, [value]);
+                    }
+                });
+            }
+
 
             beforeEach(function () {
                 mockScope = jasmine.createSpyObj(
@@ -263,6 +271,20 @@ define(
                 ]);
                 expect(mockHandle.request.calls.length).toEqual(2);
             });
+
+            it("requeries when user changes domain selection", function () {
+                mockScope.$watch.mostRecentCall.args[1](mockDomainObject);
+                expect(mockHandle.request.calls.length).toEqual(1);
+                fireWatch("axes[0].active.key", 'someNewKey');
+                expect(mockHandle.request.calls.length).toEqual(2);
+            });
+
+            it("requeries when user changes range selection", function () {
+                mockScope.$watch.mostRecentCall.args[1](mockDomainObject);
+                expect(mockHandle.request.calls.length).toEqual(1);
+                fireWatch("axes[1].active.key", 'someNewKey');
+                expect(mockHandle.request.calls.length).toEqual(2);
+            });
         });
     }
 );
diff --git a/platform/telemetry/src/TelemetrySubscription.js b/platform/telemetry/src/TelemetrySubscription.js
index 5dcab54b94..3de00e4c37 100644
--- a/platform/telemetry/src/TelemetrySubscription.js
+++ b/platform/telemetry/src/TelemetrySubscription.js
@@ -285,11 +285,17 @@ define(
          * domain objects returned by `getTelemetryObjects()`.
          *
          * @param {DomainObject} domainObject the object of interest
+         * @param {string} [key] the symbolic identifier of the domain
+         *        to look up; if omitted, the value for this object's
+         *        default domain will be used
          * @returns the most recent domain value observed
          */
-        TelemetrySubscription.prototype.getDomainValue = function (domainObject) {
-            var id = domainObject.getId();
-            return (this.latestValues[id] || {}).domain;
+        TelemetrySubscription.prototype.getDomainValue = function (domainObject, key) {
+            var id = domainObject.getId(),
+                latestValue = this.latestValues[id];
+            return latestValue && (key ?
+                                   latestValue.datum[key] :
+                                   latestValue.domain);
         };
 
         /**
@@ -302,11 +308,17 @@ define(
          * domain objects returned by `getTelemetryObjects()`.
          *
          * @param {DomainObject} domainObject the object of interest
+         * @param {string} [key] the symbolic identifier of the range
+         *        to look up; if omitted, the value for this object's
+         *        default range will be used
          * @returns the most recent range value observed
          */
-        TelemetrySubscription.prototype.getRangeValue = function (domainObject) {
-            var id = domainObject.getId();
-            return (this.latestValues[id] || {}).range;
+        TelemetrySubscription.prototype.getRangeValue = function (domainObject, key) {
+            var id = domainObject.getId(),
+                latestValue = this.latestValues[id];
+            return latestValue && (key ?
+                                   latestValue.datum[key] :
+                                   latestValue.range);
         };
 
         /**