Well does someone still get empty results when doing

      LC_ALL=C git log --after="2014-04-27 18:54:12" --before="2014-04-27 18:54:12"

on the progit repo's main branch????

If not, then...
I believe it is important to mention that `--after` means *on-or-after* and `--before` mean *on-or-before*. Although... maby it's better to mention this in normal text (and not in a comment like here).