UPDATE: Happy Note — This was fixed in CS5. Odd, though, that there was never a patch to fix the shortfall in CS4…
In previous versions of InDesign, if you dragged a frame containing a graphic to a Library, the library item would be named by the filename of the graphic in the frame. If you dragged multiple objects, the group was just labeled “Untitled.” Fair enough; it’s page geometry, and it’s up to you to pick a name for the library item.
But in InDesign CS4, everything dragged to the Library is initially named “Untitled”— there’s no recognition of a graphic filename. Bummer!
There’s no mention of this in the user guide, and no options available in the Library panel to force it to behave as it did in all earlier versions. It’s like going into a real library, and finding that all the books just say “Book” on the spine!