I am completely aware of the slider in Interface options (it's turned all the way DOWN to lowest). My windows sensitivity is perfect and I am 100% certain that there is no other profile loading for the mouse (Razer has profiles that can change sens on the fly and so on). I force this by ensuring that the default (or another, I've tested multiple) profile gets loaded everytime I run WoW.exe. I also try without profiles. The same problem always occurs.
I'm running it at 1200 DPI and in Windows 7 x64 my "pointer speed" slider is at 3 out of 11.
My previous mouses/mice (Microsoft IntelliMouse 3.0 and Razer Deathadder) did not have the same issue at all. WoW inherited the windows + driver cursor speed/sens without having to bother about the ingame pointer speed slider.
This is driving me nuts, to the point where I'm actually considering returning the mouse and getting another Deathadder/MSI3.0.
Any tips? Any knowledge? Please help!