When I first downloaded it (the full version) I kept getting a 'this is not a Win32 application' error. I had to download the patch to get mine to work.
I also only played extraction. I believe the longest I lived in a round was probably 45 seconds. I definately didn't have to go far before receiving fire. I will definately have to play again tonight.
Also, when I was on last night there wasn't many servers running at all. Is this because most weren't updated to 2.5?