First of all, I log in and see this "You last visited: Jan 21, 2007 at 09:59 AM" DAMN!
Second of all "After trials and errors, I cornered the issue : it was a bugged ancient site" Ahhh HAAAAAAA!! I have three different game with this problem (not all the same turn number). But now that I think about it, that makes perfect sense! Its always right after I started digging sites! Will do some experimenting to confirm and will let you know, thanks so much for posting this!!