For whatever reason, after killing Mercer, I cannot receive the quest to turn in the Eye of the Falmer (left or right, can't remember) to Delvin on the Xbox 360 platform. Has anyone found this bug or a way around it?

question did you turn in the puzzle cube thing from Markarth? if so that has been known to bug out the rest of the larceny items

Yes I did. So you're saying if I turn that in last, I will be able to turn them all in?

hmm... Ah've read somewhere that if ye miss one o' them while doin' quests, ye can't give in next ones. But Ah've turned them in one after another and have same prob on xbox360 - got the eye but no dialog option to turn it, but it didn't bug the bust of grey fox...

I've ran into this problem too. I gave Delvin the puzzle cube before I tried to give him the eyes of the falmer. I can't even give him either of those as well. Nice to know that the puzzle box causes this problem. Too bad I saved over the save prior to that or I'd go back 20 hours to undo the mistake. Hopefully next patch fixes this issue.