I have had several times where I launch 1Password on my ipod touch, and the desktop application says it is unavailable.
If I quit and relaunch the desktop, then it immediately "sees" my ipod touch and syncs. Any ideas on how to resolve this?
I have the exact same problem using my iPhone (OS 3.1.2) with 1P Pro (2.2.1) and 1Password 3.0.2 (Build 30419; licensed) on my MacBook.
Just tried one of the solutions listed above (ugh, just realized it's an old post) of deleting my iPhone from the left column, then starting again (with a long wait for the desktop app to ask for my 2 secrets), and it just never happens. Now my iPhone status is "not authorized", even though I've gone through the process on my iPhone of "allowing new connections." So it seems the connection between my iPhone and my Mac is even more severed now.
I also noticed a weird message on the iPhone that says that on the desktop app I should go Sync>Sync Using Wi-Fi, but all that does is open the help page in my web browser.