Ive had weapons dissapearing random huge fps spikes, menu screen overlay stuck ingame (blue blurry screen), timeouts, sound glitches (stretching and delaying) etc.
Im really hating the browser based server browser. I'd fire the guy who proposed this idea.
Edit: Am i the only one whose settings actually wont change? Doesnt matter if i have settings on low or high - its still the same, visuals wise and perfomance wise.