The Lion Preview.app seems to be blacklistet in ML through the "Bundle version=719.25" entry in the Info.plist. So I changed it to something higher (760 in this case - 765 is the version-number from ML Preview.app). Now the app fails to start, because modifying the plist-file apparently broke the signing.
Just found this thread through a link in another forum...so apparently the new Preview still sucks, maybe now more than ever. I couldn't find this line in the Info.plist file but I did find a reference to the version in the version.plist file, so I tried changing that one. But when I try to use the command line to fix the signing, I get an error message saying "object file format unrecognized, invalid, or unsuitable". Could it be Apple is on to us? Or is this more an issue of my personal failings? Thanks in advance for any response.