Okay, everything was going well until I cut the hole to mirror and merge the model. Now whenever I try to move a vertex, the model explodes. I'm not sure what information is needed to diagnose the problem, I've include the front, left and perspective views if that helps. It was box modeled with a stack of edit poly modifiers (I'm not sure why, that's just the general way the tutorial I'm watching approaches the modeling). So, what could be causing this, and is it fixable? I have several previous saved versions, but I have no idea where the problem occurred.