After several hours of use, my landscape keyboard starts typing tripple letters on single key presses and the pinch zoom on the browser goes crazy. My temps are in the mid to high 30s. I am using bugless beast with Chevy's 10 step 1ghz rom.
Those temps aren't high, so it's not related to that. Reflash whatever ROM you are using after doing a clean wipe. You could also try flashing a different kernel, such as one of chevys, and see if that doesn't fix your problem before wiping the phone completely.