Right, wasn't quite sure whether this was game or computer related but here goes...

Just recently all my chat in game window and pm's has been disappearing, however it hasn't happened on any other website, or even the funky home/forum, only in game and pm.

Sometimes most letters disappear and leave only the following 4 characters... ( ) m .

Also if i hover my cursor over anything else that will disappear too can anyone help me please!

Maybe you should return the magic mouse! Sorry couldn't resist. Does it still happen after a reboot?

I rebooted and it was okay for like an hour and done it again hmmmm..

This was a common problem with a particular Java update quite a while back, so first suggestion is to try the old unistall (all versions, there may be more than one), clear cache/history including downloaded program files, reboot, run a windows update (optional but advised) and then visit java.com for a fresh install.

If it still happens, go back to the Java archive and try the most recent version. http://java.sun.com/products/archive/