http://bugs.winehq.org/show_bug.cgi?id=19873
--- Comment #23 from Austin English austinenglish@gmail.com 2009-09-04 13:22:00 --- (In reply to comment #20)
(In reply to comment #19)
http://wiki.winehq.org/FAQ section 10.1.5:
Consider removing the default Wine Z: drive, which maps to the unix root directory. This is only a weak defense, but it might help against some attacks.
You forgot the full context:
"... The downside to this is you won't be able to run Windows applications that aren't reachable from a Wine drive (like C: or D:), so you might have to move downloaded installers to ~/.wine/drive_c before you can run them."
Which is exactly the case of this bug.
As AJ and Jacek pointed out, for Gecko this is fixable.