Today, on the stinky sewer quest, the end creature did not spawn, making the quest impossible to complete.

Before our party took the quest, another party cancelled it without completing it, so that may have something to do with it.

A similer thing happend on the bat quest, where we went through the whole quest to find that at the end there was no boss. Coming down we actually bumped into another group that had been allowed to take the quest while we were on it. They did not find a boss either.

:-(

Edit: Did you notice any other spawn that are regularly on these quests were missing otherwise?

We got all of the normal spawns on the Stinky Sewer Quest, except for the lack of the end boss.

I think the bats quest was done with two level 3s and we got no dire bats.

This happened to me on the Bat quest too.

All spawns are there and intact, apart from the boss.

This is definitely a problem. I think quests break altogether if someone takes it and logs too.