I know this issue has been discussed a million times but I haven't found anything that pointed this out.
Anyway as we both know in the set up menu you can set the Y and X value separately and you'll most probably will have to if you want to use full mouse controls.
You could settle for left and right looking only which works pretty well.
However, what I've noticed is that when you adjust the mouse sensitivity weather in game or in the settings, it only affects the X axis not the Y.
The y can only be adjusted independently through the settings menu.
gosh what a pain. When it comes to games on the build engine such as Duke Nukem, Shadow Warrior and Blood, what control scheme to you guys use? I'm curious.