http://bugs.winehq.org/show_bug.cgi?id=31229
--- Comment #2 from Jacek Caban jacek@codeweavers.com 2012-07-17 06:20:34 CDT --- Thanks for the report, patch sent:
http://source.winehq.org/patches/data/88380
BTW, it looks like there is another bug in HTML Help that causes navigation to non-existing URL. Still, we need to handle it correctly in MSHTML.