Created attachment 80540 [details]
Add to a list screen
When cataloging a new book, the lists used to appear in drop down fashion after clicking the 'Add to' button. Now, it only seems to allow the creation of a new list when all I want to do is add a book to an existing list.
Sorry if this is a dumb question, but are you logged in as a user who has permission to edit/add to existing lists?
It's a bit of a strange bug:
Bug 21297: Display public lists to existing lists when adding a new item
It will be fixed in the upcoming releases (see notes on the bug)
*** This bug has been marked as a duplicate of bug 21297 ***