A user can't get into her mailbox from the Welcome Page of Notes5. She gets "Illegal Circular Use: email classes" Yet, I can open her mailbox OK from my PC with her ID. Deleting cache.dsk didn't fix it.
The Fix - Notes5 still uses the old Workspace in the background. I had the user open the Workspace and remove her mailbox icon. She could then click on the Mailbox bookmark & it opened fine. The old "Chicklet" icon holds view info that was corrupted.