Usability: Close issue button in upper right should say "Close Issue"
This a minor usability issue: When viewing an issue, it would be ideal if the "Close" button in the upper right instead read "Close Issue". I've had a few users click "Close" thinking that it's going to close out of the issue "window" (I guess they presume it's a lightbox-style popup), but instead they end up Closing the issue entirely. I think the text "Close" is so often used to close out of lightbox style popups that some people have a tendency to instinctively click on it when they're done viewing the issue not realizing that it's actually going to close it in the DB.
Note there is already a "Close Issue" text below the issue that fully reads "Close Issue" so it would make the two buttons consistent with one another, which I also think is a usability win.