Well I haven't had the time to re download that and check if it has any corruption issues, other then the funfair.dat file. Both versions are running fine for me, had a 3 player lan a few hours back 1 xp pc and 2 win7 PCs and had a blast.
My 8 year old son managed to kick my and his uncle's butt. The fact that he was driving the suppressor going up against the blood riviera and the fraud broko obviously had nothing to do with this :P
UPDATE: I redownloaded the win7 version and when opened with winzip it does claim unfair funfair is corrupt, it can still extract the other files. Again getting the file from the xp version solved everything.
We had a 4 player LAN today but the xp machine was crashing constantly, I was unable to get an error report but it worked fine a couple of days back, a reinstall might fix it. Meanwhile I also tested the Win7 version on a vista machine and it worked fine, except for the fact that alt tab actions seemed to freeze the game(not ctd just freeze).
So much for updates so far.