union destroys model, bug?

When I try to union the objects in my file, the resulting model is shattered. Maybe some sort of bug? Here are some pictures.http://ambyra.googlepages.com/mole.pnghttp://ambyra.googlepages.com/brokenmole.png

Blender’s booleans tend to be crappy and buggy and there’s no coder to hardcode a fix.

You could use the bridge tool python script accessable in the F menu.