http://bugs.winehq.org/show_bug.cgi?id=14824
--- Comment #4 from Hans Leidekker hans@meelstraat.net 2008-08-28 07:43:26 --- I posted 3 patches that should help:
http://www.winehq.org/pipermail/wine-patches/2008-August/060303.html
Can you try them? Please attach another WINEDEBUG=+winhttp log if it still fails.