On the Macintosh platform only, the following known issue exists:
If you open the Database Properties dialog for any database and click the Archive button to get the archive window, and then click the Help button for archiving help, after closing the archive help you must click Cancel to close the Archive window and subsequently reopen the Database Properties window to save any changes. If you then attempt to save the archive settings, you will get an error 'Entry not found in Index.' If you repeatedly attempt to save changes, the client will eventually crash.
Workaround: Look up the archive help via the Help menu BEFORE entering the Database Properties window.