After several hours I manged to get it playable outdoors, but as soon as I head indoors

How in the name of the nine divines did this make it through QA?
Having to tweak ini files just to get the controls halfway working isn't making me happy.
Now I have VSync (aka bMouseAcceleration=1) turned on (I get killed by junk when entering buildings otherwise and it alleviates the x/y difference a bit),
jacked up "fMouseHeadingSensitivity=0.1000",
fiddeled with "fMouseHeadingYScale=0.1000" and "fMouseHeadingXScale=0.0500",
turned off AA and Anisotropic in the launcher and forced it through my nvidia panel.
This works okay for me outside, but when I enter a building vertical movement slows down heaps (the distance I need to move my mouse horizontal to get a 180° turn barely gets me 15° vertically). Tried out everything else in this thread, but to no avail. Anyone have an idea?
Might be related to shadows, but since I'll be turning in for today won't get around to it till tomorrow (And that's another sad thing, I pre-ordered and have the game for almost 3 days now and haven't been able to play yet :/ )