Script just stop working right?

Guys i need help - Im a new scripter so you can imagine that this is very frustrating.

Ive been designing a bot that moves around my property to specific locations, it was working fine the other day the bot rotated to look in the right direction I told him to he moved fine. In the last day all of a sudden the robot won't rotate in certain spots when I tell him to, I tried resetting the script, changing the rotate look at function position and coordinates and still nothing. this is very frustrating, can anyone tell me what happened in SL over the last day that would screw this up?
How can a script work one day and not the next????

In this particular case, it is because the latest update broke it. Linden Labs did a rolling update last night that fixed some issues with scripts, but apparently broke others. Or, perhaps, it was there from the Wednesday update and not being reported till last night, but the first explanation seems more likely.

Yes, apparently llLookAt in non-physical objects was broken by last night's update.

OK Im glad its somethign they did and not me, Its apain in the rear as it is learning to script when you have no background, even worse then Linden is messing with you!!!

Please vote on VWR-254 if you want this fixed.