[thejeff]

Definitely try creating a new game without the mods if you haven't already. Turn them off in the interface and move/delete the mod files.

I suppose the other question is when does it crash? Starting up, when opening an existing game, creating a game, after playing for awhile?

Removing Dominions and reinstalling it should put you back where you were before installing any mods.

The actual error message "myfree: corrupted mem block (high)" could also mean a hardware (bad memory) problem. If the rest of your system runs fine this is unlikely, but there are memory checker programs that could confirm that.