A while back I decided to get fancy
and try to set up Calibre via Sugarsync so that I could see my Calibre library from each of our computers, but without really understanding what I was doing. Somehow I ended up with duplicates of most of my books. I delinked the library (so I'm back to just backing up my Calibre library in Sugarsync) and sorted out the duplication problem (can't remember what I did to fix it now).
After a while, I realized that I had lost a custom column I created to record comments on books I've read. I can't even remember what I called the column. I still have the tags that I had used prior to 'fixing' the library. Is it possible that the custom comments field I had is still there somewhere in the metadata? How would I find it? Thanks in advance if anyone can help!
And just in case this happens to anyone else: I realized today that somehow I had accidentally applied the tag 'unread' to all of my books. I was able to fix it by using the fact that I rate books after I read them. So I clicked on Rating on the left, then highlighted all the books with ratings, clicked on Edit Metadata -> Edit Metadata in Bulk, then put 'unread' in the 'remove tags' section and applied it.