Sally, I checked the double tap and it is not active.
Have you tried a hard reset with the volume down and the power button held for 10 seconds? Are you sure you aren't double tapping the home button? Because that is what opens the screen selector.
I made sure it is not a double tap by looking at the trace log.
First from email which resides on home screen:
01-21 13:18:28.876: D/PortalService(782): Portal onReceive:
01-21 13:18:28.876: I/PortalService(782): onHandleIntent() action android.intent.action.CLOSE_SYSTEM_DIALOGS
01-21 13:18:28.876: D/PortalService(782): received close system dialogs: homekey
01-21 13:18:28.883: I/ActivityManager(497): Starting: Intent { act=android.intent.action.MAIN cat=[android.intent.category.HOME] flg=0x10200000 cmp=com.miui.home/.lockscreen.LockscreenActivity } from pid 497
01-21 13:18:28.930: I/ActivityManager(497): Starting: Intent { act=android.intent.action.MAIN cat=[android.intent.category.DEFAULT,android.intent.category.HOME] cmp=com.motorola.blur.home/.HomeActivity } from pid 891
and then from the home screen:
01-21 13:25:34.540: D/PortalService(782): Portal onReceive:
01-21 13:25:34.540: I/PortalService(782): onHandleIntent() action android.intent.action.CLOSE_SYSTEM_DIALOGS
01-21 13:25:34.540: D/PortalService(782): received close system dialogs: homekey
01-21 13:25:34.547: I/ActivityManager(497): Starting: Intent { act=android.intent.action.MAIN cat=[android.intent.category.HOME] flg=0x10200000 cmp=com.miui.home/.lockscreen.LockscreenActivity } from pid 497
01-21 13:25:34.555: D/ActivityRenderTarget(7742): onPause
01-21 13:25:34.594: I/PortalReceiver(782): onReceive() actionandroid.intent.action.HISTORY_CHANGED
01-21 13:25:34.594: I/PortalService(782): onHandleIntent() action android.intent.action.HISTORY_CHANGED
01-21 13:25:34.594: D/TaskNotifier(782): TaskNotifier android.intent.action.HISTORY_CHANGED
01-21 13:25:34.594: W/TaskNotifier(782): enter HandleHistoryChanged
01-21 13:25:34.594: D/TaskNotifier(782): mIdleTaskId =64
01-21 13:25:34.594: D/TaskNotifier(782): receiving intent with idleTaskId =65 mIdleTaskId =64 movedBackId =3
01-21 13:25:34.594: D/TaskNotifier(782): setting sendHomeTabChangedIntent to true
01-21 13:25:34.594: D/TaskNotifier(782): setting mIdleTaskId to 65
01-21 13:25:34.594: D/TaskNotifier(782): Home Task Activity com.miui.home.lockscreen.LockscreenActivity
01-21 13:25:34.594: I/ActivityManager(497): Starting: Intent { act=android.intent.action.MAIN cat=[android.intent.category.DEFAULT,android.intent.category.HOME] cmp=com.motorola.blur.home/.HomeActivity } from pid 891
01-21 13:25:34.602: D/TaskNotifier(782): iconId = 2130837541 name =MiLocker
01-21 13:25:34.602: I/TaskNotifier(782): setPermission:/tmp/tab_icon_2
01-21 13:25:34.602: V/TaskNotifier(782): name MiLocker id 65
01-21 13:25:34.602: D/TaskNotifier(782): Case:new task,sending home tab changed intent to aiw, mIdleTaskId =65
01-21 13:25:34.602: D/TaskNotifier(782): New task {com.miui.home/com.miui.home.lockscreen.LockscreenActivity}
01-21 13:25:34.602: I/ActivityManager(497): Starting: Intent { act=android.intent.action.MAIN cat=[android.intent.category.DEFAULT,android.intent.category.HOME] cmp=com.motorola.blur.home/.HomeActivity } from pid 891
01-21 13:25:34.618: D/ActivitityRenderTarget(7742): onResume
01-21 13:25:34.633: D/TaskNotifier(782): Closed task 64
01-21 13:25:34.633: W/TaskNotifier(782): Deleting file /tmp/tab_64
Hard reset didn't fix it. Is a factory reset my last resort?
Thanks,
Adil