When I add or edit any 1Password item on iOS v6.1.1 with 2 vaults both synced through Dropbox, the changed (or added) item will not sync through Dropbox until I press the top-left All Vaults icon, cycle to one of the other vaults, then go back to All Vaults. I can go to Settings - Vaults - Sync Now, and it says it syncs, but there is no actual sync until I cycle out of All Vaults and back into it.
Similarly, the Mac 1Password app syncs correctly through Dropbox, but changes made on my Mac will sync not to iOS until I cycle out of All Vaults and then back into it. Again, I can go to Settings - Vaults - Sync Now (and it appears to sync), but it will not actually sync until cycling out of All Vaults and back into it.
My Dropbox app on iOS is working correctly for every other app. I have 2 vaults on my Mac and iOS, but All Vaults is set to only display only 1 of them. I've deleted and reloaded the iOS 1Password app, and this bug recurs every time.
AgileBits Update: This is a known issue. Our developers believe they have the code written to fix it, so once it has been tested and approved by Apple it should be available in an update soon. Sorry for the inconvenience!