I noticed that you get an access violation in GraalEngine.dll when you immediately changes the player's animation in the gani's script.
NPC Code:
SCRIPT
function onCreated()
{
// Code here, as long as it doesn't sleep()
// Putting a sleep() here removes the violation
// There might be less obvious code of course
setAni("idle", "");
}
SCRIPTEND
There was 3 others on the server (100% of the testing population) who experienced this too when the gani was played, wich means it is probably not a client error.