I am not sure if this is even a valid bug; my brother killed another player in Stendhal 1.05 (private server) some time ago and he was waiting for the 2-week-expiration. He told me that apparently the timer has been reset to 2 weeks whenever he bought an outfit ( http://stendhalgame.org/wiki/Stendhal_Games#Hiring_special_outfits ) and that outfit expired. It might also have been a server restart which resetted the timer. Whatever it was: if he is right and didn't attack anyone, there seems to be a bug which resets the timer.
I know that bug reports like this one are not as helpful as others, but if this is a valid bug, the report might help anyway. ;-)