hmm alot of people seem to be saying the same thing, that there is a problem in the right corner so this could be down to its hardware. You'll just have to wait for a fix dedicated to this issue.

Bossyboots if you dont have OS 2007 edition v. 2.2006.51-6 then go this link to download the application which will update you to the latest one, which if just a firmware issue should resolve it.

http://europe.nokia.com/A4305010