Was hoping this was fixed. And their changelog on the apple security updates website even listed a "fix" regarding deleted iMessage attachments, but it didn't clear this issue: I've had around 15megs of saved data in Settings/Usage/iMessage since the days when that bug in a previous version of iOS left photo attachments around after iMessage threads deleted. With iOS 8, they added a nice feature in Settings/iMessage to autodelete threads and attachments older than 30 days. Nice, right? But I selected that and I STILL have 15 megs of old unfindable stuff. YES, I rebooted. YES, i removed all existing threads in iMessage, etc, etc.. No, I don't think I should have to install a 3rd party backup editor to restore.