Server browser Lag

When I move my mouse cursor over the rows in the server browser, I get massive lag, FPS drops to 1 and theres slight audio glitching.

Here's a video, sorry about the bad quality but it does its job:



Oh yeah and of course specs:

Intel Ivy Bridge Core i5 (quad-core) 3570K @ 4.2GHz
AMD/ATI Radeon HD 4870x2 custom overclocked (GPU 775MHz, memory 960MHz)
16GB DDR3 1600MHz
Latest Catalyst 13.1 legacy drivers, all other system drivers installed.
Windows 8 x64