the troubles with buildings

Okay.. I'm sure someone's asked this before, but I haven't yet found a thread related to this.

In my little for fun cmapaign I have several buildings that all train units that are out of the norm (like Gnolls and Kobolds.) The problem here is that when I was trying them out having my workers build these buildings, I would select the building after it had complete construction.. and then the game crashed! I sex what's up wit dat?

I know some things can cause Warcraft to crash, but what might have caused such a reaction and how do I fix it?

You might wanna check that all the tooltips that the building shows are working properly, thats my best guess thats its an invalid tooltip picture thats crashing the game.