MrConceit: I specifically noticed this in Mount Doom, on a long corridor, but tested it later and it's always the case. There I noticed it because I had piercing shot on. What happened was I killed something like 5 squares away from me, and then (this was in the north-northwest side of Mount Doom) the bolts continued on and injured and eventually killed the Nightwalkers I think it was. The monsters have zero way of touching you when they're that far out of range, so it's quite abusable. I tested it on Morgoth when I went to kill him, by using a void waygate like 35-40 squares directly east of where I started. I took down about 70 percent of Morgoth's life while he wasn't able to do anything by this ranged attack effect. So I'd say it's kind of a problem. Oh, final thing, I turned off piercing shot and I don't think it effected it. I was still able to hit and kill stuff far far out of range, so it isn't piercing shot itself causing the buggy effects.
ToME Wiki