I am getting strange crash reports from Droid X and Droid Pro.
android.content.res.Resources$NotFoundException:
File res/drawable/zz_moto_actionbar_bkg.xml f
We hit this same bug and, at least in our case, it turned out to be due to running out of memory while an image associated with that layout was being loaded. The layout itself seems to be some skinning stuff Motorola is doing for the alert dialog (my assumption). The only way I found out it was an OutOfMemoryError is that our QA tester generated an adb bugreport when he hit the crash and I could see the OutOfMemoryError in the bugreport caused while attempting to decode an image (on the same thread on which the stack trace was generated).