Shaba1 asked me about the error the other day and I just ran into it again so here it is.
Apparently blender 2.42 doesn’t like Vector /= Number
So in stead you want to do Vector *= 1.0/Number
In the megabool script you’ll have to change 2 lines to make it work.
At line nr 1217 change,
and at line nr 366 change,
Cambo had a look and it should be fixed in cvs… in the meantime this should fix it.