http://bugs.winehq.org/show_bug.cgi?id=19856
--- Comment #6 from Dan Kegel dank@kegel.com 2009-08-27 22:43:33 --- Created an attachment (id=23299) --> (http://bugs.winehq.org/attachment.cgi?id=23299) key part of cygwin's strace output on tiny demo executable on Wine, with +relay,+file
These two logs might help show what's going wrong. They're the section right around where Cygwin picks the right canonical name for update-alternatives on Vista, and the wrong canonical name on Wine.