[Droid X General] Cavyjason:
I am having this EXACT same problem. I first noticed it today when I tried to change the wallpaper via media gallery. Now opening gallery creates the same behavior. There is no standard "force close" dialog. It simply disappears.

A logcat shows this:

E/TopScreenList( 8725): TopScreenList onResume

E/TopScreenList( 8725): TopScreenList cleanAnimationViews

E/TopScreenList( 8740): TopScreenList onResume

E/TopScreenList( 8740): TopScreenList cleanAnimationViews

E/TopScreenList( 8740): W20814 - ThumbLoadedCallback for item=com.motorola.gallery.TopScreenList$Media@45869678 image #3 success?=success

E/TopScreenList( 8740): W20814 - ThumbLoadedCallback for item=com.motorola.gallery.TopScreenList$Media@45869678 image #0 success?=success

E/TopScreenList( 8740): W20814 - ThumbLoadedCallback for item=com.motorola.gallery.TopScreenList$Media@45869678 image #0 success?=success

E/TopScreenList( 8740): W20814 - ThumbLoadedCallback for item=com.motorola.gallery.TopScreenList$Media@45869678 image #3 success?=success

E/TopScreenList( 8740): W20814 - ThumbLoadedCallback for item=com.motorola.gallery.TopScreenList$Media@45869678 image #0 success?=success

E/TopScreenList( 8740): W20814 - ThumbLoadedCallback for item=com.motorola.gallery.TopScreenList$Media@45869678 image #3 success?=success

E/TopScreenList( 8740): W20814 - ThumbLoadedCallback for item=com.motorola.gallery.TopScreenList$Media@45869678 image #1 success?=success

E/TopScreenList( 8740): W20814 - ThumbLoadedCallback for item=com.motorola.gallery.TopScreenList$Media@45869678 image #1 success?=success

E/TopScreenList( 8740): W20814 - ThumbLoadedCallback for item=com.motorola.gallery.TopScreenList$Media@45869678 image #1 success?=success

E/TopScreenList( 8740): W20814 - ThumbLoadedCallback for item=com.motorola.gallery.TopScreenList$Media@45869678 image #1 success?=success

E/TopScreenList( 8740): W20814 - ThumbLoadedCallback for item=com.motorola.gallery.TopScreenList$Media@45869678 image #1 success?=success

E/TopScreenList( 8740): W20814 - ThumbLoadedCallback for item=com.motorola.gallery.TopScreenList$Media@45869678 image #0 success?=success

E/TopScreenList( 8740): W20814 - ThumbLoadedCallback for item=com.motorola.gallery.TopScreenList$Media@45869678 image #0 success?=success

E/TopScreenList( 8740): W20814 - ThumbLoadedCallback for item=com.motorola.gallery.TopScreenList$Media@45869678 image #3 success?=success

E/TopScreenList( 8740): W20814 - ThumbLoadedCallback for item=com.motorola.gallery.TopScreenList$Media@45869678 image #3 success?=success

E/TopScreenList( 8740): W20814 - ThumbLoadedCallback for item=com.motorola.gallery.TopScreenList$Media@45869678 image #2 success?=success

E/TopScreenList( 8740): W20814 - ThumbLoadedCallback for item=com.motorola.gallery.TopScreenList$Media@45869678 image #2 success?=success

E/TopScreenList( 8740): W20814 - ThumbLoadedCallback for item=com.motorola.gallery.TopScreenList$Media@45869678 image #2 success?=success

E/TopScreenList( 8740): W20814 - ThumbLoadedCallback for item=com.motorola.gallery.TopScreenList$Media@45869678 image #2 success?=success

E/TopScreenList( 8740): W20814 - ThumbLoadedCallback for item=com.motorola.gallery.TopScreenList$Media@45869678 image #2 success?=success

E/TopScreenList( 8740): W20814 - ThumbLoadedRunnable for item=com.motorola.gallery.TopScreenList$Media@45869678 index=0 image #3

E/TopScreenList( 8740): W20814 - ThumbLoadedRunnable for item=com.motorola.gallery.TopScreenList$Media@45869678 index=0 image #0

E/TopScreenList( 8740): W20814 - ThumbLoadedRunnable for item=com.motorola.gallery.TopScreenList$Media@45869678 index=0 image #0

E/TopScreenList( 8740): W20814 - ThumbLoadedRunnable for item=com.motorola.gallery.TopScreenList$Media@45869678 index=0 image #3