I just had to replace my 2nd TP for keyboard issues.

It started about a week ago, it would sometimes miss characters when I was typing... I figured I just wasn't pressing hard enough, but I didn't make any changes to my habits.

After a few days of this, the problem started getting worse. Also, it would act as if I were holding keys and repeat them. It started only doing a few, but that too got worse. It ended up being where it was missing most of my keystrokes, and the ones that it didn't miss, it repeated for up to 45 seconds. A soft reset would have the keyboard working for few keystrokes but the problem would immediately reappear. Shortly after this, the keyboard completely died.

I took it to a repair center, they opened it up and checked the plug on the keyboard I guess. It worked when they gave it back, that was all I cared about. Took it home and reflashed it. About an hour later the problems reappeared. The phone worked overnight, it sat on my desk and wasn't touched. When I opened it up in the morning, the keyboard didn't work any more. Sprint replaced it today.