http://bugs.winehq.org/show_bug.cgi?id=33008
--- Comment #17 from Erich Hoover erich.e.hoover@gmail.com --- (In reply to facoptere from comment #15)
... 1/ on Linux 3.13-1, an UDP server does not bind the IP address specified, but binds 0.0.0.0. ...
This brings something to mind, is your application possibly trying to use getsockname() on these sockets? (I really need a lot more information to help you, but this would be something to look for in the log)