Originally Posted by tompec
Try to install it again (Screen lock and off) and delete data in app setting.
ive tried ics 4.0.4 since 2 days now and havent experienced this bug, did for a moment when i used a live wallpaper that changed pictures every minute, but was solved after i unninstalled it, so i dont thing its the roms fault, what i do experience however is a bit of a lag, well some small games are slower while others, such as tap tap revenge 4 are now completely unplayable, apart from that i havent found any bug with it, music works great, battery life is good, its smooth,wifi and 3g are fast and work without lag, turns on and off fast, and you can root it easily with fastboot boot.
-xperia arc 4gb memory
-palm treo 750 2gb memory