Very strange. I know during testing we had various paper doll (the model of your character in inventory) and portrait picture errors, but I thought we had had them all fixed. I hadn't seen any in the PC version for quite some time. Perhaps that can help me narrow down this issue. It's the first I have seen it being reported (though the forum moves fast) so it seems like it might be a rare one.
Just to be clear DrHojo, the portrait looks all funky like that after you start tweaking the hair? Is this also how you got that problem Apoptygmaa?
Since two of you have the issue, some PC specs could help isolate the problem if you have similarities between your systems.
Hopefully you can still enjoy the game otherwise, but I'll definitely look into this further.