How frequently do you check your library?
Judging from your posts in this thread it's cycled between working and not working every 3 - 4 days up until this last time where it's swapped back and forth more frequently, but that may just come down to timing of when you've actually been looking at your library.
My OCD leads me to checking it maybe 20 times per day or so.
EDIT: Come to think of it, that number sounds a bit low. 30-40 is probably more accurate. I've never counted, though.