Yup, I'm not hoarding only items - I'm hoarding quests, too, and I'm beginning to have ridiculous amount of them. This thing here has happened to me so often lately that I'm seriously starting to consider making notes while playing. I usually accept quests as I come across them but often I don't have time or opportunity to complete them right at the moment. So, after finishing ten other quests hours and hours later when I finally stumble upon the quest item, I might not have any recollection of who gave me the quest or where I can find them again. And let me tell you: playing two different characters at the same time doesn't help much either.
ahh quest overload... especially worse when you end up stuck with a quest building a hoard of talos amulets you cannot drop and previous completed quest interfere with the bosses having items now for other quests..