Every time a creature is unaware of your position it becomes 'friendly'. Prompt 'Really backstab...?' shows up. No more splattering/stabbing without getting chaotic. Similar to issue 1640 (http://www.adom.de/forums/project.php?issueid=1640), though this is not once every 10 turns. To reproduce go ID stairhopping with gnomish assassin (skilled/very skilled and stealthy on lev3 to speed up stealth/backstab growing). Just got to level 8 (boy is this boring) in pre8 without a single 'stab' msg (unless Yes on prompt that is). In pre7 3rd/4th creature you land next to will get backstabbed.