I have a ASUS EEEPC 1005HA running ubuntu 11.10, it was running easypeasy but I upgraded to the latest after first encountering my problem

The issue is that for some reason the when the laptop is running on battery, randomly the letter c will be spewed to the screen in what ever application is running and its very frequent. Additionally pressing certain other characters such as s or numbers will make c's appear on the screen. Pressing the C key wont.

When the laptop is not fully charged however and is running off a depleating battery this problem often doesn't present itself. Its a very odd thing and I amc ncot sucre what it is... I jucst had tcoc plcug tche pocwerc in and yccou can see the effect it has soc vercy annoying.