http://bugs.winehq.org/show_bug.cgi?id=11198
--- Comment #7 from Mikolaj Zalewski mikolaj.zalewski@gmail.com 2008-07-16 14:11:29 --- It should have been WINEDEBUG=+ver - the channel is called ver. If the installer is using the version API, this may give a hint what's going on. You could also try WINEDEBUG=+msi. If you have another log with a lot of warnings then this can also be helpful.