Little, but annoying.

And I'm not talking about wasps. Basically, whenever I mirror any geometry in Maya at the moment and let it automatically merge the vertices, I get random triangles throughout the merge. I'm sure this is an error on my part, one of those 'I've checked a box somewhere by accident and can't remember where' situations. Anyway, to fight it I have to join up all the vertices manually, very time consuming when it is happening on EVERYTHING I MODEL.

Here's what Maya is doing at the moment (look in the middle of the mesh):

Here's the manual correction: