Well guys, i do have the same problem, freeze,then only way to get out is via task manager! Before i started playing today i used the auto repair funktion that steam has, didnt realy think it would helpbut i have to say: Ive had a stable connection all day.
If it wasnt the repair that helped then i guess it was the map i played, maybe some maps are just buggy for some ppl??????
Whatever it was it worked, ill update here next time i get on a server if its really working or if i was just lucky!