The only app I have trouble with in Gingerbread is Gameloft's Modern Combat 2.
After updating from Froyo to Gingerbread, the game now has a popup stating that the game was not purchased on this device and that I must buy a copy...
Already spent $7 on the app and had trouble installing it back when I first purchased it.
Clearing the app cache made it worse. App just crashed when run.
Uninstalled and reinstall tells me that the game is not supported on my device.
I guess I'll need to contact customer support (again) to get a Gingerbread version of the game.
Ugh, GameLoft is such a pain. Seems that GameLoft ties your DRM license to the device firmware version.