diff --git a/CHANGELOG.md b/CHANGELOG.md
index 334461bffb..89f3741535 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,83 @@
+Changes in [0.12.4-rc.3](https://github.com/matrix-org/matrix-react-sdk/releases/tag/v0.12.4-rc.3) (2018-05-11)
+===============================================================================================================
+[Full Changelog](https://github.com/matrix-org/matrix-react-sdk/compare/v0.12.4-rc.2...v0.12.4-rc.3)
+
+ * Instant Sticker Picker :zap:
+   [\#1888](https://github.com/matrix-org/matrix-react-sdk/pull/1888)
+
+Changes in [0.12.4-rc.2](https://github.com/matrix-org/matrix-react-sdk/releases/tag/v0.12.4-rc.2) (2018-05-09)
+===============================================================================================================
+[Full Changelog](https://github.com/matrix-org/matrix-react-sdk/compare/v0.12.4-rc.1...v0.12.4-rc.2)
+
+ * Improve appearance of short-lived widget loading spinner
+ * Make sticker picker fully-fledged feature
+ * Fix incorrect positioning with widget loading indicator
+
+Changes in [0.12.4-rc.1](https://github.com/matrix-org/matrix-react-sdk/releases/tag/v0.12.4-rc.1) (2018-05-09)
+===============================================================================================================
+[Full Changelog](https://github.com/matrix-org/matrix-react-sdk/compare/v0.12.3...v0.12.4-rc.1)
+
+ * Update from Weblate.
+   [\#1881](https://github.com/matrix-org/matrix-react-sdk/pull/1881)
+ * Pin lolex at 2.3.2 to avoid bug causing tests to fail
+   [\#1880](https://github.com/matrix-org/matrix-react-sdk/pull/1880)
+ * Replies: un-break click-to-mention on SenderProfile for reply&preview
+   [\#1878](https://github.com/matrix-org/matrix-react-sdk/pull/1878)
+ * Add tests for RoomList
+   [\#1877](https://github.com/matrix-org/matrix-react-sdk/pull/1877)
+ * Fix crash when browser doesn't report page change measurement
+   [\#1874](https://github.com/matrix-org/matrix-react-sdk/pull/1874)
+ * fix thinko when changing from ClientPeg to context in static method (DUH)
+   [\#1875](https://github.com/matrix-org/matrix-react-sdk/pull/1875)
+ * Fix Replies :D
+   [\#1873](https://github.com/matrix-org/matrix-react-sdk/pull/1873)
+ * Update eslint-plugin-react
+   [\#1871](https://github.com/matrix-org/matrix-react-sdk/pull/1871)
+ * relax lint for jsx-curly-spacing and arrow-parens
+   [\#1872](https://github.com/matrix-org/matrix-react-sdk/pull/1872)
+ * Use develop js-sdk in jenkins build
+   [\#1870](https://github.com/matrix-org/matrix-react-sdk/pull/1870)
+ * Replies
+   [\#1741](https://github.com/matrix-org/matrix-react-sdk/pull/1741)
+ * Use the right js-sdk branch when testing
+   [\#1869](https://github.com/matrix-org/matrix-react-sdk/pull/1869)
+ * Prevent error responses wedging group request concurrency limit
+   [\#1867](https://github.com/matrix-org/matrix-react-sdk/pull/1867)
+ * Refresh group rooms and members when selecting a tag
+   [\#1868](https://github.com/matrix-org/matrix-react-sdk/pull/1868)
+ * Refactor GroupStores into one global GroupStore
+   [\#1866](https://github.com/matrix-org/matrix-react-sdk/pull/1866)
+ * Switch back to using blob URLs for rendering e2e attachments
+   [\#1864](https://github.com/matrix-org/matrix-react-sdk/pull/1864)
+ * Hide inline encryption icons except when hovering over a message
+   [\#1845](https://github.com/matrix-org/matrix-react-sdk/pull/1845)
+ *  UI fixes in SessionRestoreErrorDialog
+   [\#1860](https://github.com/matrix-org/matrix-react-sdk/pull/1860)
+ *  Fix UX issues with bug report dialog
+   [\#1863](https://github.com/matrix-org/matrix-react-sdk/pull/1863)
+ * fix ugly img errors and correctly render SVG thumbnails
+   [\#1865](https://github.com/matrix-org/matrix-react-sdk/pull/1865)
+ * Fix error handling on session restore
+   [\#1859](https://github.com/matrix-org/matrix-react-sdk/pull/1859)
+ * Add tests for GroupView
+   [\#1862](https://github.com/matrix-org/matrix-react-sdk/pull/1862)
+ * Update version of hoek
+   [\#1861](https://github.com/matrix-org/matrix-react-sdk/pull/1861)
+ *  Fix bug that caused crash when analytics HS/IS whitelists not specified
+   [\#1858](https://github.com/matrix-org/matrix-react-sdk/pull/1858)
+ * Fix Analytics to not import DEFAULTS, therefore avoiding NPE
+   [\#1857](https://github.com/matrix-org/matrix-react-sdk/pull/1857)
+ * Null check piwik config before using it
+   [\#1856](https://github.com/matrix-org/matrix-react-sdk/pull/1856)
+ * Track actual window location origin and hash
+   [\#1853](https://github.com/matrix-org/matrix-react-sdk/pull/1853)
+ * Replace document.origin with window.location.origin
+   [\#1855](https://github.com/matrix-org/matrix-react-sdk/pull/1855)
+ * Optionally hide widget popout button.
+   [\#1854](https://github.com/matrix-org/matrix-react-sdk/pull/1854)
+ * Add a button to 'pop out' widgets in to their own tab.
+   [\#1851](https://github.com/matrix-org/matrix-react-sdk/pull/1851)
+
 Changes in [0.12.3](https://github.com/matrix-org/matrix-react-sdk/releases/tag/v0.12.3) (2018-04-30)
 =====================================================================================================
 [Full Changelog](https://github.com/matrix-org/matrix-react-sdk/compare/v0.12.3-rc.3...v0.12.3)
diff --git a/package.json b/package.json
index 9c71c1399c..1125dd3980 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "matrix-react-sdk",
-  "version": "0.12.3",
+  "version": "0.12.4-rc.3",
   "description": "SDK for matrix.org using React",
   "author": "matrix.org",
   "repository": {
diff --git a/src/components/views/elements/AppTile.js b/src/components/views/elements/AppTile.js
index 2923d6dceb..0895ede636 100644
--- a/src/components/views/elements/AppTile.js
+++ b/src/components/views/elements/AppTile.js
@@ -364,9 +364,7 @@ export default class AppTile extends React.Component {
         if (!this.widgetMessaging) {
             this._onInitialLoad();
         }
-        if (this._exposeWidgetMessaging) {
-            this._exposeWidgetMessaging(this.widgetMessaging);
-        }
+        this.setState({loading: false});
     }
 
     /**
@@ -404,8 +402,6 @@ export default class AppTile extends React.Component {
         }).catch((err) => {
             console.log(`Failed to get capabilities for widget type ${this.props.type}`, this.props.id, err);
         });
-
-        this.setState({loading: false});
     }
 
     _onWidgetAction(payload) {
diff --git a/src/components/views/messages/MStickerBody.js b/src/components/views/messages/MStickerBody.js
index 501db5e22b..3a412fc2e2 100644
--- a/src/components/views/messages/MStickerBody.js
+++ b/src/components/views/messages/MStickerBody.js
@@ -107,6 +107,16 @@ export default class MStickerBody extends MImageBody {
             placeholderFixupHeight = content.info.h + 'px';
         }
 
+        // The pixel size of sticker images is generally larger than their intended display
+        // size so they render at native reolution on HiDPI displays. We therefore need to
+        // explicity set the size so they render at the intended size.
+        // XXX: This will be clobberred when we run fixupHeight(), but we need to do it
+        // here otherwise the stickers are momentarily displayed at the pixel size.
+        const imageStyle = {
+            height: content.info.h,
+            // leave the browser the calculate the width automatically
+        };
+
         placeholderSize = placeholderSize + 'px';
 
         // Body 'ref' required by MImageBody
@@ -132,6 +142,7 @@ export default class MStickerBody extends MImageBody {
                     <img
                         className={'mx_MStickerBody_image ' + this.state.imageClasses}
                         src={contentUrl}
+                        style={imageStyle}
                         ref='image'
                         alt={content.body}
                         onLoad={this._onImageLoad}
diff --git a/src/components/views/rooms/Stickerpicker.js b/src/components/views/rooms/Stickerpicker.js
index 1bb972f67f..7771067f9b 100644
--- a/src/components/views/rooms/Stickerpicker.js
+++ b/src/components/views/rooms/Stickerpicker.js
@@ -34,6 +34,7 @@ export default class Stickerpicker extends React.Component {
         this._onHideStickersClick = this._onHideStickersClick.bind(this);
         this._launchManageIntegrations = this._launchManageIntegrations.bind(this);
         this._removeStickerpickerWidgets = this._removeStickerpickerWidgets.bind(this);
+        this._updateWidget = this._updateWidget.bind(this);
         this._onWidgetAction = this._onWidgetAction.bind(this);
         this._onResize = this._onResize.bind(this);
         this._onFinished = this._onFinished.bind(this);
@@ -90,11 +91,12 @@ export default class Stickerpicker extends React.Component {
         if (!this.state.imError) {
             this.dispatcherRef = dis.register(this._onWidgetAction);
         }
-        const stickerpickerWidget = Widgets.getStickerpickerWidgets()[0];
-        this.setState({
-            stickerpickerWidget,
-            widgetId: stickerpickerWidget ? stickerpickerWidget.id : null,
-        });
+
+        // Track updates to widget state in account data
+        MatrixClientPeg.get().on('accountData', this._updateWidget);
+
+        // Initialise widget state from current account data
+        this._updateWidget();
     }
 
     componentWillUnmount() {
@@ -116,6 +118,14 @@ export default class Stickerpicker extends React.Component {
         });
     }
 
+    _updateWidget() {
+        const stickerpickerWidget = Widgets.getStickerpickerWidgets()[0];
+        this.setState({
+            stickerpickerWidget,
+            widgetId: stickerpickerWidget ? stickerpickerWidget.id : null,
+        });
+    }
+
     _onWidgetAction(payload) {
         if (payload.action === "user_widget_updated") {
             this.forceUpdate();