changed event

I've been having a lot more problems lately with the changed event and wondering if this a known problem. Especially after 1.6.9 update I have had this problem several times. It seems to happen after a sim crashes. The changed event is cycled over and over again causing a problem with my teleporters. I notice pose balls been having problems too, I was wondering if anything related with sit issues.


Snipet of my code:

changed(integer a)
    {
        key b=llAvatarOnSitTarget();
        if(b !=NULL_KEY)
        {
            llSetAlpha(0, ALL_SIDES);
            llSetText("", <0,0,0>, 0);
            teleporting = TRUE;
            vector bb = llGetPos();
            llSetPos(bb + <0,0,height>);
            llSleep(0.05);
            llUnSit(b);
            llSetPos(bb);
            llSetAlpha(1.0, ALL_SIDES);
            llSetText(location + "\n (Click arrows to change) \n Right click to Teleport", color, 1.0); 
        }
        if (a & CHANGED_INVENTORY) llResetScript();
    }

This isn't a known issue, and we could use more information. I'm going to move this to the technical issues forum for discussion. If anyone else knows anything about this problem, please let us know.