Limewire getting all messy in Vista x64

[Sokkiejjj]

Dear Limewire users,

I have a problem with Limewire 4.18.8 in Vista Ultimate x64.
I use a Phenom 9950 processor at stock settings, 4GB DDR2 RAM and a HD4870 X2 as my graphics card.
I can run Limewire fine for like 5~10 minutes, but after that, when I hover my mouse over a part of Limewire, the screen gets all flocky, making me unable to use Limewire correctly.
http://home.caiway.nl/~walooyen/limewire%20flocky.jpg

P.S: Er net dus achter gekomen dat dit een Nederlandse sectie was, naja, zo kan he took, neem ik aan. :P

Met vriendelijke groet,

Rick van Dijk