OpenGL doesn't appear to want to render any triangles to the screen anymore. It'll render lines for my models' bones and normals just fine, however, but no triangles...
I checked glGetError() and it comes back with 1282, and a quick google reveals that this could be caused by some driver issues, however, I'm not sure. I was experimenting with some render target code before I noticed the issue, but again, I am getting some things to show up onscreen. I'm not even sure if error 1282 is the cause of this issue either. I've also tried restarting my computer.
EDIT: A quicker looks reveals that the triangles are appearing, it's just that everything is rendered pure-black. There's one mesh that doesn't appear black, however.