I'm trying to insert a muzzle flash for a gunshot. I have some geometry with a glow on it and I'm trying to key frame it one frame at a time, key-framing the visibility on and off. For whatever reason, the frames with the visibility turned on won't render the glow. If I break all animation connection though, I can see it so I know it's there. Please help me figure out this problem.

Edit: Actually, I notice is does this with anything w/ keyframed visibility. Why is this and how can I fix it?