http://bugs.winehq.org/show_bug.cgi?id=4309
--- Comment #8 from Bruno Jesus 00cpxxx@gmail.com --- After spending sometime testing this I decided to test in windows. It turns out at least XP will not allow you to create a directory named "...".
This reminds me of other bug (I can't find right now) about a problem related to listing files with same name but different case, AFAIR we closed it invalid (or maybe wontfix) since it was not possible to do that in windows.