http://bugs.winehq.org/show_bug.cgi?id=23810
--- Comment #4 from markk@clara.co.uk 2010-07-28 06:40:00 --- Aha.
Some other points worth noting: - The installer works correctly under Windows (Vista). - The same thing happens regardless of what the Wine Windows version is set to. - File permissions seem to matter less than whether the medium is read-only (write-protected or a CD-ROM). I tried mounting the CD with -o mode=777 so all files had rwx permissions, but the installer still fails.