http://bugs.winehq.org/show_bug.cgi?id=27476
--- Comment #13 from Hans Leidekker hans@meelstraat.net 2011-11-22 02:31:33 CST --- Created attachment 37572 --> http://bugs.winehq.org/attachment.cgi?id=37572 winhttp: Don't resolve the hostname again for subsequent requests.
Does this patch help?