It's probably the vanilla. In both cases, it can seem musty. Depends on how you look at it. I find that sometimes Addict seems "stale" to me, in the sense of old-fashioned and "decaying." I'm not explaining this well. It's a personal recollection of how the cheap, damp apartments of relatives smelled, of an unpleasant musk and powdery vanilla. I definitely get this association from Addict (and I do wear it here and there) and can see how it might be applicable to Shalimar as well.