http://bugs.winehq.org/show_bug.cgi?id=35055
--- Comment #2 from Hans Leidekker hans@meelstraat.net 2013-12-05 13:27:53 CST --- (In reply to comment #1)
(In reply to comment #0)
Also it seems as regression, that introduced by http://source.winehq.org/git/wine.git/commitdiff/dd305c3700c1b5b0de41b875589...
Adding author to CC. P.S. Maybe msi_set_sourcedir_props() should have some version checks before fetching SourceDir from registry?
Have you confirmed that reverting the patch fixes your bug? It fixes the case where a product is patched, which normally means that the product version is incremented. So a version check is probably not sufficient.