If you die with a bad reputation (lower than 0), you will more skill ''amount unknown''. In a 2 year old village, the skill loss is 0.6 from 5 random skills.
When you die fighting '''another player''' (also known as PvP death) you will lose 0.25 points from the main [[fighting]] skill '''only'''. However getting killed by Son of Nogumps seem to yield this effect as well.
Suicide counts as a PvE death, but you do not get the penalty reduction for being at home.