As far as my problem:
Well, what I did was uninstall old video card drivers and reinstalled the latest official ones. Then I installed the full 1.0-1.21 patch and everything has been just peachy. I tried on several different servers on many maps for quite a few hours. Just hope my luck holds up.
And for Baylord's
About that kit things, it's happened to me a few times, besides it being a bit weird there is nothing more it it.
I've had my team show up as enemies.
You and the rest of the world, it's the red name bug and it sucks. Just try and pay closer attention to uniforms and if you see your squad behind you with one red name with them, just use common sense. It sucks, but it's just something to get used to.
I've never had claymores detonating on teammates, the only time I got teamkills with claymores is when a teammate is next to an enemy and gets taken out with him. But that's the closet I can come to figuring it out.