The "Bound Until Death" quest: Astrid gave me no gold after the Vittoria Vici job, only the summon spell. I went through the whole thing at least six times and each time Astrid insists that Vittoria was killed other than while she addressed the wedding guests. All six times I heard that speech, picking different timings to be sure Astrid would get it right. It's apparently a levelled amount of gold so I dunno what I missed. grrrrrr.
Seems to be a common bug. Really annoying. Is gold the only bonus? I think I could do without and just play on, but if it's someting unique and special ...
I had the same experience since I first thought that she needed to be killed when she was on the ground level with the other people. It then turned out that when she appears to leave she in fact goes to a balcony. If you killed her there then I can't help you, since that worked for me.
DB last, I think, series of quest are so bugged. It made me start a new rogue character and give up on my first one. The bonus situations never occurred on any of the last kills for me.
I'm almost level 40 on my second thief and I haven't even started those quest yet. waiting on a patch or something.
@2ndlieutenant: Nope, on the balcony. Didn't get the bonus. Is a known bug, according to the wiki, if you have it, you can do whatever you want, it will not be recognized.