isOpaque is not appropriate for AllAppsTabbed; replace with isAnimating().

src/com/android/launcher2/AllAppsTabbed.java

@@ -91,6 +91,11 @@ public class AllAppsTabbed extends TabHost implements AllAppsView {
         return mAllApps2D.isVisible();
     }
 
+    @Override
+    public boolean isAnimating() {
+        return (getAnimation() != null);
+    }
+
     @Override
     public void setApps(ArrayList<ApplicationInfo> list) {
         mAllApps2D.setApps(list);