diff --git a/Examples/Movies/MovieCell.js b/Examples/Movies/MovieCell.js
index e6a9b1078..341460e58 100644
--- a/Examples/Movies/MovieCell.js
+++ b/Examples/Movies/MovieCell.js
@@ -34,11 +34,14 @@ var MovieCell = React.createClass({
     var criticsScore = this.props.movie.ratings.critics_score;
     return (
       <View>
-        <TouchableHighlight 
+        <TouchableHighlight
           onPress={this.props.onSelect}
           onShowUnderlay={this.props.onHighlight}
           onHideUnderlay={this.props.onUnhighlight}>
           <View style={styles.row}>
+            {/* $FlowIssue #7363964 - There's a bug in Flow where you cannot
+              * omit a property or set it to undefined if it's inside a shape,
+              * even if it isn't required */}
             <Image
               source={getImageSource(this.props.movie, 'det')}
               style={styles.cellImage}
diff --git a/Examples/Movies/MovieScreen.js b/Examples/Movies/MovieScreen.js
index 1f6d579e5..09d6544df 100644
--- a/Examples/Movies/MovieScreen.js
+++ b/Examples/Movies/MovieScreen.js
@@ -34,6 +34,9 @@ var MovieScreen = React.createClass({
     return (
       <ScrollView contentContainerStyle={styles.contentContainer}>
         <View style={styles.mainSection}>
+          {/* $FlowIssue #7363964 - There's a bug in Flow where you cannot
+            * omit a property or set it to undefined if it's inside a shape,
+            * even if it isn't required */}
           <Image
             source={getImageSource(this.props.movie, 'det')}
             style={styles.detailsImage}
diff --git a/Examples/Movies/MoviesApp.js b/Examples/Movies/MoviesApp.js
index 1c6fc4b4f..ce025462e 100644
--- a/Examples/Movies/MoviesApp.js
+++ b/Examples/Movies/MoviesApp.js
@@ -28,6 +28,9 @@ var SearchScreen = require('./SearchScreen');
 var MoviesApp = React.createClass({
   render: function() {
     return (
+      /* $FlowIssue #7363964 - There's a bug in Flow where you cannot
+        * omit a property or set it to undefined if it's inside a shape,
+        * even if it isn't required */
       <NavigatorIOS
         style={styles.container}
         initialRoute={{
diff --git a/Examples/UIExplorer/MapViewExample.js b/Examples/UIExplorer/MapViewExample.js
index 5df00236d..31034bb69 100644
--- a/Examples/UIExplorer/MapViewExample.js
+++ b/Examples/UIExplorer/MapViewExample.js
@@ -159,12 +159,15 @@ var MapViewExample = React.createClass({
   render() {
     return (
       <View>
+        {/* $FlowIssue #7363964 - There's a bug in Flow where you cannot
+          * omit a property or set it to undefined if it's inside a shape,
+          * even if it isn't required */}
         <MapView
           style={styles.map}
           onRegionChange={this._onRegionChange}
           onRegionChangeComplete={this._onRegionChangeComplete}
-          region={this.state.mapRegion}
-          annotations={this.state.annotations}
+          region={this.state.mapRegion || undefined}
+          annotations={this.state.annotations || undefined}
         />
         <MapRegionInput
           onChange={this._onRegionInputChanged}
diff --git a/Examples/UIExplorer/UIExplorerApp.ios.js b/Examples/UIExplorer/UIExplorerApp.ios.js
index fe643dec5..01f1ce4d6 100644
--- a/Examples/UIExplorer/UIExplorerApp.ios.js
+++ b/Examples/UIExplorer/UIExplorerApp.ios.js
@@ -44,6 +44,9 @@ var UIExplorerApp = React.createClass({
       );
     }
       return (
+        /* $FlowIssue #7363964 - There's a bug in Flow where you cannot
+          * omit a property or set it to undefined if it's inside a shape,
+          * even if it isn't required */
         <NavigatorIOS
           style={styles.container}
           initialRoute={{
diff --git a/Examples/UIExplorer/UIExplorerPage.js b/Examples/UIExplorer/UIExplorerPage.js
index ea1761a28..02c8370e3 100644
--- a/Examples/UIExplorer/UIExplorerPage.js
+++ b/Examples/UIExplorer/UIExplorerPage.js
@@ -37,9 +37,9 @@ var UIExplorerPage = React.createClass({
     var ContentWrapper;
     var wrapperProps = {};
     if (this.props.noScroll) {
-      ContentWrapper = View;
+      ContentWrapper = (View: ReactClass<any, any, any>);
     } else {
-      ContentWrapper = ScrollView;
+      ContentWrapper = (ScrollView: ReactClass<any, any, any>);
       wrapperProps.keyboardShouldPersistTaps = true;
       wrapperProps.keyboardDismissMode = 'interactive';
     }
diff --git a/Libraries/Components/ScrollView/ScrollView.js b/Libraries/Components/ScrollView/ScrollView.js
index 8d274bdc5..5700ff964 100644
--- a/Libraries/Components/ScrollView/ScrollView.js
+++ b/Libraries/Components/ScrollView/ScrollView.js
@@ -299,7 +299,7 @@ var ScrollView = React.createClass({
       onResponderRelease: this.scrollResponderHandleResponderRelease,
       onResponderReject: this.scrollResponderHandleResponderReject,
     };
-    
+
     var ScrollViewClass;
     if (Platform.OS === 'ios') {
       ScrollViewClass = RCTScrollView;
diff --git a/Libraries/Network/NetInfo.js b/Libraries/Network/NetInfo.js
index 47184d181..c62cb209a 100644
--- a/Libraries/Network/NetInfo.js
+++ b/Libraries/Network/NetInfo.js
@@ -147,7 +147,7 @@ var NetInfo = {
     eventName: ChangeEventName,
     handler: Function
   ): void {
-    _subscriptions[handler] = RCTDeviceEventEmitter.addListener(
+    _subscriptions[String(handler)] = RCTDeviceEventEmitter.addListener(
       DEVICE_REACHABILITY_EVENT,
       (appStateData) => {
         handler(appStateData.network_reachability);
@@ -159,11 +159,11 @@ var NetInfo = {
     eventName: ChangeEventName,
     handler: Function
   ): void {
-    if (!_subscriptions[handler]) {
+    if (!_subscriptions[String(handler)]) {
       return;
     }
-    _subscriptions[handler].remove();
-    _subscriptions[handler] = null;
+    _subscriptions[String(handler)].remove();
+    _subscriptions[String(handler)] = null;
   },
 
   fetch: function(): Promise {
@@ -204,12 +204,12 @@ NetInfo.isConnected = {
     eventName: ChangeEventName,
     handler: Function
   ): void {
-    _isConnectedSubscriptions[handler] = (connection) => {
+    _isConnectedSubscriptions[String(handler)] = (connection) => {
       handler(_isConnected(connection));
     };
     NetInfo.addEventListener(
       eventName,
-      _isConnectedSubscriptions[handler]
+      _isConnectedSubscriptions[String(handler)]
     );
   },
 
@@ -219,7 +219,7 @@ NetInfo.isConnected = {
   ): void {
     NetInfo.removeEventListener(
       eventName,
-      _isConnectedSubscriptions[handler]
+      _isConnectedSubscriptions[String(handler)]
     );
   },
 
diff --git a/Libraries/PushNotificationIOS/PushNotificationIOS.js b/Libraries/PushNotificationIOS/PushNotificationIOS.js
index 732d4c029..fa2be650a 100644
--- a/Libraries/PushNotificationIOS/PushNotificationIOS.js
+++ b/Libraries/PushNotificationIOS/PushNotificationIOS.js
@@ -66,14 +66,14 @@ class PushNotificationIOS {
       'PushNotificationIOS only supports `notification` and `register` events'
     );
     if (type === 'notification') {
-      _notifHandlers[handler] = RCTDeviceEventEmitter.addListener(
+      _notifHandlers[String(handler)] = RCTDeviceEventEmitter.addListener(
         DEVICE_NOTIF_EVENT,
         (notifData) => {
           handler(new PushNotificationIOS(notifData));
         }
       );
     } else if (type === 'register') {
-      _notifHandlers[handler] = RCTDeviceEventEmitter.addListener(
+      _notifHandlers[String(handler)] = RCTDeviceEventEmitter.addListener(
         NOTIF_REGISTER_EVENT,
         (registrationInfo) => {
           handler(registrationInfo.deviceToken);
@@ -143,11 +143,11 @@ class PushNotificationIOS {
       type === 'notification' || type === 'register',
       'PushNotificationIOS only supports `notification` and `register` events'
     );
-    if (!_notifHandlers[handler]) {
+    if (!_notifHandlers[String(handler)]) {
       return;
     }
-    _notifHandlers[handler].remove();
-    _notifHandlers[handler] = null;
+    _notifHandlers[String(handler)].remove();
+    _notifHandlers[String(handler)] = null;
   }
 
 
diff --git a/Libraries/ReactIOS/InspectorOverlay/resolveBoxStyle.js b/Libraries/ReactIOS/InspectorOverlay/resolveBoxStyle.js
index e0bfb601c..0c2857bd0 100644
--- a/Libraries/ReactIOS/InspectorOverlay/resolveBoxStyle.js
+++ b/Libraries/ReactIOS/InspectorOverlay/resolveBoxStyle.js
@@ -20,7 +20,7 @@
  *
  * If none are set, returns false.
  */
-function resolveBoxStyle(prefix: String, style: Object): ?Object {
+function resolveBoxStyle(prefix: string, style: Object): ?Object {
   var res = {};
   var subs = ['top', 'left', 'bottom', 'right'];
   var set = false;
diff --git a/Libraries/ReactNative/createReactNativeComponentClass.js b/Libraries/ReactNative/createReactNativeComponentClass.js
index 3940df012..5d6d87cd8 100644
--- a/Libraries/ReactNative/createReactNativeComponentClass.js
+++ b/Libraries/ReactNative/createReactNativeComponentClass.js
@@ -26,7 +26,7 @@ type ReactNativeBaseComponentViewConfig = {
  */
 var createReactNativeComponentClass = function(
   viewConfig: ReactNativeBaseComponentViewConfig
-): Function { // returning Function is lossy :/
+): ReactClass<any, any, any> {
   var Constructor = function(element) {
     this._currentElement = element;
 
@@ -39,7 +39,7 @@ var createReactNativeComponentClass = function(
   Constructor.prototype = new ReactNativeBaseComponent(viewConfig);
   Constructor.prototype.constructor = Constructor;
 
-  return Constructor;
+  return ((Constructor: any): ReactClass);
 };
 
 module.exports = createReactNativeComponentClass;
diff --git a/Libraries/Utilities/BridgeProfiling.js b/Libraries/Utilities/BridgeProfiling.js
index e3c47907b..c94d84fdd 100644
--- a/Libraries/Utilities/BridgeProfiling.js
+++ b/Libraries/Utilities/BridgeProfiling.js
@@ -14,7 +14,7 @@
 var GLOBAL = GLOBAL || this;
 
 var BridgeProfiling = {
-  profile(profileName: String, args?: any) {
+  profile(profileName: string, args?: any) {
     if (GLOBAL.__BridgeProfilingIsProfiling) {
       if (args) {
         try {