Thanks for the information. Never seen that before. I love how it gives you absolutely no specifics. It "might not" have installed correctly. If it didn't, reinstall using "settings that are compatible with this version of Windows". You know what those are, right?
There's absolutely no reason that I know of that the program wouldn't run properly on Vista. But given how much they have changed, it is entirely possible that Vista expects programs to install differently. And of course, it should continue to be able to install programs that don't conform to this standard, given the god-knows-how-many (millions? billions?) of programs out there written before Vista...