Hi Tomas! I've just read the whole topic and was very impressed with your knowledge. Maybe you will be able to solve my similar problem?
I also notice audio drops and clicks in my enviroment. I use program called Resolume Arena. It is a video app for playing live video clips with effects etc.
I also run Ableton Live which is a DAW. I have no problems with audio drops there. My videocard is on FireWire, and audio buffer is set to 64.
My machine is i7-950 3.6Ghz, 12GB Ram, Nvidia GTX560Ti.
Can I send you the ETL file from command prompt? I have no idea what is causing the dropouts... thanks!