I voted: "My players know a little bit about the rules, and I wish they knew more."
They know enough to run their characters in a basic way (know the general rules re: combat, understand AoOs, know their spells and where to reference them), but they can't do anything complicated - at all. The just don't have the knowledge (or inclination) to learn about complicated options, so they just don't do them (even to the point where it's detrimental to their characters).
That's their problem to work out, though. It certainly keeps the game moving...