Is there anyway to check integrity of Anrdoid 2.0.1 OS?

After downloading / installing the recent 2.0.1 update via USB, I noticed the Droid flashing wildly several times, as well as freezing recently after email / text use. Soln - remove battery then reinstall battery. Droid reboots and all seems well.

Before this Droid worked great. 30 days was over 12/9. Have TEC: so I can exchange the phone. Do I need to?

If this is an app issue, how do I know which app? One way to find out - delete all apps then reinstall them one by one to see where / when this happens again... what if this weird behavior is due to app updates?