Title says it all really. Not a great deal but was something I came across just now.
If you use followspline to position a script_mover upon map start and want it to be invisible, then make sure you insert a WAIT command into the followspline, else the setstate invisible won’t work.
I was using this on the rocks from the wall debris in helmsdeep - couldn’t work out why despite repeated setstate invisibles they were visible (well, in spectator mode anyway, because they are within the volume of the wall). Sticking in the WAIT command and setstate invisibling afterwards fixed that 