Originally Posted by hapax legomenon
That just doesn't make sense. Why would Mobipocket Desktop give you the ability to edit this metadata if it didn't make any difference whatsoever on the device?
(Or did this work only on PDAs but not e-ink readers)?
Yes, the metadata is used on at least some devices -- for example, the Palm version uses the info from the .mbp files. The Cybook doesn't use the metadata -- though I wish it would! When I bought the Cybook I already had a large library of mobi files -- and I was very surprised to discover, as you did, that many of my books had missing/incorrect author & title information.
The mobi2mobi program from the mobiperl package developed by forum member tompe can be used to edit the metata inside a mobi file itself.