unlocking phone after gingerbread fails

[Kegman]

only when my phone is plugged into charger does the slider fail to unlock. its slides but then slides back to start withotu unlocking phone. If i unplug charger, it works immedately. sometimes it works fine while charging, others it dont. about 50% of time.

I've had several bugs with gingerbread update but all have been resolved by clearing data and cache. anyone fix this or know how to clear cache for unlock feature?