Hey, I've been doing a head-modeling tutorial for the past couple days which relies heavily on the split polygon tool. Everything was going well, and then all of a sudden it stopped working with any kind of constancy.

I've tried changing various things in the options (magnetism, edge snapping etc) but nothing seems to help. I created a simple polygon cube and tried splitting that up, which worked just fine, so there must be something screwy with my head (the one I'm modeling).

I also tried looking for hidden faces to delete, and found none.

Any suggestions? Has anyone run into this sort of thing before?

Maya version: 6.5 unlimited