You know what's even more annoying about that? I've tested the 100 lemming "limit" by messing around with the resources, and making levels with 100 lemmings, and the actual game works perfectly fine. (it properly crashed when I tried making a level with 200 lemmings, when it got to about 140/150, though) However, the strings got messed up and it didn't give me any messages afterwards ("You totally stormed that level" et. al.), and the ratings, so it'd say " un" instead of "Fun" or something. It just strikes me that they should have fixed this problem with three digits...
It also actually supports (if you mess around) time limits 10 minutes or greater, and percentage goals over 100%... which is quite funny when you get things like "You rescued 100%; Better rethink your strategy before you try this level again!"