All the files listed as invalid (ie different from my versions) were either updated after the initial release (intro.mpg), are changed after the game is started for the first time (dgen_themes.000 and game.sav) or are dependent on your game settings and options (config.div and keylist.txt).
It does not appear that anything with the game itself is corrupt, so I doubt re-installing the game would help.
[color:"orange"]I'm going to now send just the Bd_act1_start directory compressed.[/color]
Each save is a separate subfolder in the '..\Beyond Divinity\savegames' folder. There should be folder names corresponding to what you named your saves, and numbered quicksave folders if you use quick saves; either of these (made after the problem started) would work to test if the same thing happens on a non-Vista system. The 5 'bd_act#_start' folders are created/updated by the game/patch, and are just used to update data during act transition (your Bd_act1_start folder would be identical to mine).
