This concerns iCloud on the Mac with Lion 10.7.3. My wife and I have our own personal @me.com Apple IDs that we use for our respective primary iCloud accounts. (Actually these are migrated MobileMe accounts). This is all well and great. Recently we took an Apple ID that we'd be using as a shared account in iTunes and started using that as a "joint" iCloud account for sharing Contacts, Calendars and Reminders. This is also all well and good. Mostly. The iPhone (with iOS 5.0.1) does "the right thing" -- that is, within the Contacts and Calendar apps it utilizes the descriptions from the iCloud accounts to distinguish between the different sets of data (clicky for larger image if necessary). The Mac (with Lion 10.7.3) however does not do the right thing. The primary and secondary accounts are completely ambiguous in both iCal and Address Book. Yes, of course, we could use the content of those accounts to distinguish between them, but this is beside the point. (clicky for larger image) Does anyone know of, perhaps, a plist preference that can be set to get it to "do the right thing" on the Mac? Or should it just be written off as a (very minor) bug?