http://bugs.winehq.org/show_bug.cgi?id=26031
--- Comment #49 from Hans Leidekker hans@meelstraat.net 2013-07-30 02:12:06 CDT --- (In reply to comment #48) ...
Maybe the only solution is to force SO_REUSEADDR in every socket created inside wine.
I see zero problems using this flag for all bind()'s - it cannot hurt.
It can hurt because it changes behavior visible to applications. It's also opening up a security hole.