Going through Tyria with a Warrior/Ranger this time, I came upon a "patched" mission that appears to be messed up: (it worked fine before)
This mission is(was) relatively simple; go out from Yak's Bend, find a missing party of Ascalon refugees, and return them to Yak's Bend safely.
The party is nearby, but it requires you fight into the area they are at.
All well and fine, and I reached them no problem, and their leader (forgot the woman's name) says, "We'll follow you."
No problem right? lead them back to Yak's Bend for 500xp...
Wrong.
It appears these stragglers now have a death wish:
They follow you until any enemy units appear on your map, then immediately hightail it to them in hopes of committing suicide ASAP.
To add a little comedy, they yell things like, "Help us!" "Oh no! It's the dwarves again!" "Save us!"
I even went back a second time, (after they had all earlier fallen on their swords..repeatedly...) cleared the entire radar area around where they are found, and then attempted to lead them back down the cleared path - with the same results - they went bolting off down a path I hadn't even explored yet - to find glorious oblivion at the hands of several ice ettins!
"I'll follow you." She says?
I'd rather gut her and her party myself.

Anyway, beware there may be missions out there that aren't intended to be completed, but rather provide some comedy relief!
Regards,
Talesin