Uh-oh: iOS 8 has only-barely-kinda-sorta rolled out, and it's already breaking things. Dropbox has 'temporarily suspended' the auto-upload feature on its iOS app because of compatibility issues with iOS 8.
If you're already in the process of upgrading, Dropbox warns in a blog post that you should double-check that photos have uploaded before deleting them (because, duh), and that they're working with Apple to fix the problem, as always.
Remember, folks: upgrade time means it's also backup-all-your-shit time. You have been warned. [Dropbox]