Touchscreen working great for weeks and now buggy and erratic.

Has anyone else experienced their touchscreen having excellent response and precision for weeks, then one day it becomes completely unusable like other users who have received buggy touchscreens direct from the vendor? I now have the same symptoms, extremely jumpy screen, unresponsive when tapping an icon, etc... we've heard this all before many times. I've flashed every available ROM released to date starting from 827 all the way back to 804. Not a software issue as far as I can tell, unless somehow the screen became uncalibrated.Also a question to the people with the jumpy screens already. What ways have you found to deal with it so it continues to be a usable device?Any ideas at all would be greatly appreciated.