Victor has asked me to cherry-pick 180e4b678003:

http://bugs.python.org/issue20320 (original issue)
http://hg.python.org/cpython/rev/180e4b678003/ (checkin into trunk)
http://bugs.python.org/issue20646 (cherry-pick request)

This revision changes the rounding behavior of fractional-second timeouts for select.select and select.kqueue. I don't have enough context to judge whether or not this is bad enough to warrant cherry-picking, and the discussion on the issue didn't seem to come to a firm consensus.

Can I get some opinions on this?

FWIW, I'm going to cut the next preview in a few minutes, and this won't be in it, but I don't actually tag until most of a day from now.

/arry