Middle-click pasting from X clipboard into vim in xterm doesn't work
Going through different terminals, it works in terminator (terminator-0.96-x86_64-1sl), but not in Xterm (which I prefer), and not in terminology, xfce4-terminal, Konsole, aterm, nor rxvt. What makes it work in terminator I don't know.
It does work to paste into vi (or nano) through middle-click, just not through vim. Vim pastes from the internal clipboard rather than the X clipboard.
It also works through using Shift-Ins to paste. Just not middle click.
I just so happens that I prefer pasting through middle-click, and using vim and Xterm, the only combination that doesn't work.