I saw an open edit on a question, and when I clicked it I got this:
One of the buttons is shown only partly, and I think there are some buttons missing.
Browser is Chrome 47.0.2526.111 on Windows 7 (x64). Zoom is 100%.
Code Review uses very original layout comparing to other SE network sites. We had to use quite a lot of CSS hacks to make it looking good. Some of those hacks apparently affected popup module and its sizing.
status-completed I've fixed that and it should be good now.