Audible restrictions wrong (off-by-one error?)

Question

In iTunes 7.5 on Mac OS 10.5:
I have a few Audible ebooks in iTunes, all under my own (single) account. Just recently I added another ebook from another account.
However, when I now try to sync my iPod, I receive an error that 'content from no more than two Audible accounts' can be present on the iPod at once.
This is clearly incorrect - there are files from exactly two different Audible accounts in iTunes, not more than two.
(This isn't helped by iTunes lacking an 'owner' or 'account' field in view options, though - so there's no clear way to double-check the owner of a selection of tracks without looking at the Get Info data of each track in turn - and doing this reveals only two different accounts)
It's also unclear as to whether iTunes has synchronised just the one account (which? The first, presumably) or whether - as I suspect - this has caused iTunes to skip syncing of Audible content entirely.
How should this bug be reported to Apple? As a bug which must be fixed, there's the fact that ebooks from two accounts aren't synchronised when they should be. As a feature request, if there are ebooks from more than two accounts present, then iTunes should prompt the user to choose which two are synchronised.

Answer 1

Quit Mail. Force quit if necessary.
Back up all data. That means you know you can restore the Mail database, no matter what happens.
Triple-click anywhere in the line below on this page to select it:
~/Library/Mail/V2/MailData
Copy the selected text to the Clipboard by pressing the key combination command-C. In the Finder, select
Go ▹ Go to Folder
from the menu bar. Paste into the box that opens (command-V), then press return.
A folder window will open. Inside it there should be files with names as follows:
Envelope Index
ExternalUpdates.storedata
Move those files to the Desktop, leaving the window open. Other files in the folder may have longer names that begin as above. Move those files, if any, to the Trash.
Log out and log back in. Relaunch Mail. It should prompt you to re-import your messages. You may get a warning that the index is damaged and that Mail has to quit. Click OK. Typically, the process takes a few minutes, but it may take hours if you have gigantic mailboxes. In that case, you may be able to speed things up by temporarily adding your home folder to the Privacy list in the Spotlight preference pane. Remove it when Mail has finished importing.
Test. If Mail now works as expected, you can delete the files you moved to the Desktop. Otherwise, post your results.