Debian Hardware :: Certain Libraries Compiled With Acceleration Support?

I just set up my Debian Squeeze (previously I was an Ubuntu/Kubuntu user) with KDE and Catalyst 10.8 to run my HD5070 graphics card. I've read alot on various forums of all the 5xxx users like me unable to properly setup the system and others who say thier video watching, wine game playing and composition are working fine. The problem is tearing while playing video or manipulating windows within the DE. I have read ALOT about this subject as it is obviously very important to me. I've read alot 60+ page threads on phoronics full of names like xv and libva and about using mplayer with gl so on and so forth. Problem is, I can't find a wiki to explain how they mesh together. My questions are:

1. Are certain libraries compiled with acceleration support?
2. If so, why are other libraries not compiled with acceleration support?
3. I get a feeling the libraries these guys are using are different ffmpeg and stuff that those in the repos. Are they?
4. If so, where do you get them?

In short, how does one get compositing and watch a movie tear free (the tearing occurs with or without compositing)? No amount of xorg.conf playing fixes it and the driver is properly installed with direct rendering.