Could be just you as it often depends on what browser you use, and it seems if my computer is ever trying to load up something else at the same time that the strat map will bug out. Apparently it's resource-intensive, or something. Do you use the strat map on the c-rpg website, or do you use strategus.c-rpg.net? The latter tends to be less buggy, and is also larger, which helps things.