http://bugs.winehq.org/show_bug.cgi?id=32441
--- Comment #1 from Hans Leidekker hans@meelstraat.net 2012-12-19 08:13:57 CST --- Created attachment 42848 --> http://bugs.winehq.org/attachment.cgi?id=42848 patch
I can't reproduce this but I can see how it might fail to restore proxy settings. Does this patch help?