When I vote to close one of my own questions here on dba.SE meta, or on dba.SE, the dialog is off-center and clipped. This does not happen on our main site or on any other site in the network as far as I can tell. I also believe this is a new symptom since the roll-out of close vote changes.
To reproduce, simply vote to close a question you asked. Though it seems to be browser-specific. I am running Chrome 27.0.1453.116 on Mac OS 10.9 and the symptom does not happen on Safari.
Also, it seems to be question-specific, and, in fact, asker-specific. It happens on this question and on this question also, both asked by me, but not any questions not asked by me, e.g. this question.
On the plus side, it's easy enough to grab the floating window and drag it to somewhere useful.
Now, how often are we voting to close our own questions? Pretty seldom. But the same thing happens for the mod dialog, which may be more common (e.g. purging comments):
Whoa, inception. Kind of.