User reported problems when updating a working copy from a repository which contains a dir named 'E:'. When verifying this with 1.8.0, I got an error message (great). The error message was not so great though, reporting '.' instead of 'E:' as the invalid filename. Just reporting it here in case someone is interested (and setting it to P5 ... the most important thing is that this generates an error message). See http://svn.haxx.se/users/archive-2013-06/0097.shtml for more info. From a quick look, the problem seems to be that in update_editor.c#make_dir_baton, the given path is first run through svn_dirent_basename (which converts 'E:' to ''), and only then is passed to path_join_under_root (which generates the error message). Not sure how best to fix this.