After today's 1,2 GB patch, I got new bugs, one of the most annoying of them is the audio one, where the game just make the explosions and win music in a loop, it happened to me when i joined a game on the middle and was solved when a new game began, but the entire server was complaining about it, and it happened to me in two different servers, one was American the other was Brazilian, some players got exactly the same issue, some did not got the sound back when the new game started, some heard a interference sound, some complained about having the sound back and then having the sound removed again minutes later.
I got some disconnection problems I didn't had on the past too, the infamous "Game disconnected: Something went wrong" is now happening to me, I've never got that one till today.
I doesn't know if this will help, but my specs are:
Core I5 3470
8GB of RAM Corsair Vengeance
EVGA Nvidia Geforce GTX 660 TI SC (Driver 332.21 installed, but some players with the beta 334 got the same issue as well)
PSU Corsair TX650V2
Game installed on a secondary HDD
20 MB/s internet connection
MB: Gigabyte GA-Z77X-D3H, the sound card is onboard.
Some of the players had the issue on AMD Radeon as well.
And thanks for the little performance tweaks, now I can play on Ultra at 60 fps.
Hope this help you to solve some of the bugs, or at least, to know about their existence.