You can only hear voice from your own team. Voice is pretty critical in this game for teamwork, but so far I haven't found more than two people on a team using voice.
2. Can you get a screenshot of the exact location?
3. Need more details about this. You can't switch weapons at all? Is the gun stuck it its firing animation? If you pick up ammo, does the problem go away?
Restart of Steam should fix it
The original depot that was released for the beta was built as low violence. That was fixed a few minutes later, so if you still see this problem it should be fixed by restarting Steam - you don't need to worry about deleting anything.
Any other repro steps?
Haven't been able to reproduce this internally. As Chris_D said, I presume you're running Vista? Is this still happening, and are there any other steps involved in reproducing the problem?
You said you added another .5 gig RAM 2 weeks ago - bad ram could easily cause the problems you describe. Try pulling out the new stick, see if that fixes it.
Best thread evar!
I like the thinking here - some ideas that never occurred to me before. There's actually some very interesting info that's "hidden in plain view" as they say. Not the kind of thing that a person is likely to find on the first time through the game, and I suspect no one has...
Sorry, it's been over a month since I last played - look in Keyboard options (where you can map the keys) and click the "Advanced" button. That's where the fast weapon switch option is, and I think that's where you'll find the crosshairs options as well.
In options you can change the crosshair to show your health and suit levels - I forget exactly what the option is called. It makes it much easier to see.