I finaly track down my last larceny target and pick it of mercer's corpse "Eye of the Falmer" and my quest to take it back to Delvin dosent appear this also happend on my other saved game on my "Honning Brew Decanter" this seems to happen on the last target for me to pick up, does anyone else get this annoying glich and if so how do you get around it? thanks.

Did you pick up the left or the right eye?
You need the left

I picked up both at first then i reloaded it then i picked up the left eye and vice versa and it still wont do it

He only ever takes 6 of the 7 targets. Tried it twice, and same result. Doesn't matter what order you do it in, the last object will not be taken.