llTakeControls(controls, accept, pass_on_until_you_go_to_another_sim);

I am working on a script that intercepts mouse clicks while in mouselook inside vehicles. I set the pass_on variable to FALSE, since I didn't want the vehicle to stop (i.e. be grabbed) by the avatar whenever they click. It works correctly whenever the script starts. However, as soon as I move to another sim, if I click, the vehicle gets "grabbed" & stops dead in its tracks until I release.