Anytime I try to open the notifications on the right in the Android app, the app crashes. "Unfortunately, Stack Exchange has stopped." But the new notification number clears. Happens both from within the app and from the android push notifications.
This is fixed in the current beta update, and will be fixed in the next non-beta release (anything with a version higher than 1.0.51) -- If you'd like, you can join our testing group to get the fix ASAP.