The most obvious example is when switching to the shockrifle, the texture constantly reloads in.

Normally I'd just class this as a graphical issue, but notice that when you fire a rocket, for a brief period when it starts flying it has only the trail, no rocket mesh (try firing then quickly pressing f4 to pause everything but the player).

This is starting to affect something I'm working on which uses pretty fast projectiles, you end up not being able to see them for a time.

Anyone have any idea why this is happening?