http://bugs.winehq.org/show_bug.cgi?id=19594
--- Comment #2 from Vitaliy Margolen vitaliy@kievinfo.com 2009-08-09 16:26:48 --- Some other sites work (you can test yourself). Dunno what is so special about yahoo.com. Since wine's iexplore doesn't have functioning view source it's hard to see what exactly doesn't work.
The site does complain that it knowns nothing about the browser I am using.