http://bugs.winehq.org/show_bug.cgi?id=22989
--- Comment #2 from Hans Leidekker hans@meelstraat.net 2010-06-01 06:11:57 --- There's a continuous cabinet in this installer, which means the cabinet_next_cabinet callback is called, which modifies the MEDIAINFO structure (including the disk id) passed to the installfiles_cb callback. Ouch.