Crash a lot after recent patches ...

The game used to run smoothly on my computer. Somehow after recent patches (the ones introduce the races). It started to crash a lot. I have died many times due to the crashes and 15% exp lost is no fun.

My computer is fairly decent. But I do have an ATI card,
GV-R785OC-2GD (http://www.gigabyte.com.au/products/product-page.aspx?pid=4155#ov). Once a while the game just crashes and my screen is filled with blue/white'ish vertical stripes.

Another possible reason that I can think of is that I started to use GMP+Lightning Arrow. But I was fine with LMP+LA before and the FPS did not drop much with the GMP.

I really this issues can be solved asap. Right now the game is close to unplayable to me ... I am happy to provide any further debug information if needed.