http://bugs.winehq.org/show_bug.cgi?id=20801
--- Comment #38 from Artem S. Tashkinov t.artem@mailcity.com 2011-05-14 09:11:02 CDT --- (In reply to comment #37)
I believe even if this MSI installer rules don't comply with Microsoft specifications, this "misbehaviour" still has to be followed/implemented in Wine.
God knows if there are any other MSI installers relying on the same "feature".