I've been using 1Password desktop Mac and syncing with Dropbox for a few months. Just updated this morning to v3.3.0
I just bought 1Password Pro 3.5 for my iPhone 4. When I first launch it, it requires a 4-digit password and then a master alpha password.
I go to your app's Dropbox Sync. It wants my Dropbox email and password. I put it in and now it says it can't sync because my master password is wrong.
So I have to enter the master password I just made up, and THEN put in my desktop password twice. It would have been nice if it advised me to use the same password as my desktop version in the first place. It's just very confusing. And still it doesn't sync. I still don't know what it wants so I can get it to Dropbox Sync.