Aside from having my Karma stomped down to Terrible and being completely blocked from posting comments, I'm also being automatically logged out after viewing several pages.
If this is another problem, I'd like to begin the count of issues I've encountered so far.
1) Moderation weightings have been skewed such that a negative moderation affects karma significantly downward while positive moderation barely affects karma upward.
2) The new comment history page is completely fucked.
3) New cookie? New security? WTF?
4) Automatic logging out.