Quote Originally Posted by d'Arthez
I doubt that is the same bug, pezhetaroi. More likely one of the essential EB-files has become corrupt - one of those files which has to be loaded when starting (or continuing) a campaign.

It is possible that the save-games are still working, but your EB files are a bit messed up.
I concur. I would suggest reinstalling EB0.80. Then load your save games and see if the problem persists.