Hi, I'm still tryin to solve my weird problem :) I have 500hz hidusbf, markc fix. The tests were made on windows 7 64bit pulpit, mouse enhancment turned off and 4/11 in mouse panel. Check these two screens.
http://imageshack.us/photo/my-images/853/mousemoveok.jpg/

and

http://imageshack.us/photo/my-images/94/mousemovebad.jpg/

First one is ok, and after several minutes I get the 2nd results with similar mouse move. Why there are so many red backgrounds ? Same result with mx518/razer da. I use icemat, but I tried on white sheet of paper, and it was the same. Is it a bug in mousemoverecord (I tried with all processors on, and also with one)? Is it some of the windows 7 process ? Dunno is it important but my mobo has p55 chipset. Thanks for helpin