Today I've posted this answer on Stack Overflow.
I got downvoted at first, which normally lowered my reputation down by 2 points; later on, the downvote was removed, which increased my reputation by 2 points, as usual. Then I got three upvotes. Finally, one upvote was removed.
After that upvote was removed, the 2 rep points that were subtracted due to downvoting, and that were restored after the downvote was removed, have been subtracted again.
Then I got a further upvote, but the rep was not increased (presumably because I already earned the maximum 200 rep points today). My rep, which was 11.125 before I posted the answer, is now 11.123.
Here is a screenshot of the inconsistent information I get from my profile page and from the box at the top of the page (see the screenshot below). I also haven't cast any downvote on answers today.
Could this be a bug?