Penguin beak glitch
 

This I'm sure has a simple fix, since there is a very obvious pattern to the glitch, but I don't know what it is. My intention: create the beak of a penguin so that it can open and close, and has actual modeling inside the beak. Problem: when I model it in a polygon setting it is fine, but conversion to Subdiv returns the following:

And the picture... sorry...

It looks as if you have verts that are not welded, could have happened when you extruded faces/edges without 'keep faces together' turned on. So I'm thinking its not a glitch. You can start merging those verts or edges (your choice really) or start over :p

That's what I thought too. I did indeed attempt vertice merging, but it didn't help. I ended up deleting that section and redoing it a different way, but it would be interesting to find out what occurred, so:

I had a beak with no openings originally. I selected the bottom faces and detached them. Then I reattached the back edges to the empty hole. I selected that ring of edges, the one at the base of the beak, and created a face in there to serve as the inside of the mouth. Then, I selected the border (if viewed from the top) around the beak, and extruded that until I had created a surface to cover the hole.... wow. There is almost no way anyone can understand what I just said, right?

Anyway, I do have a working version now.