I have 1 password installed on my MAC, iPhone and iPad. I am syncing to Dropbox (which for some reason I can only get to work through the internet, not the icons installed on my computer and devices.) When I make a change on the MAC, it is reflected in the internet Dropbox on the computer and iPad, but not the iPhone, which gives the "problem loading 1password data file" message. It is NOT busy syncing. when I try the link to the key data file, (from the iPhone), nothing happens. When I go to your help guide, it is less than helpful. Any changes made to the file on the MAC are not reflected in the other device's 1 Password files.
Also when I tried on the MAC, going to the Export column, dropbox folder, it asks me to select a file only from those listed on my hard drive, not a Dropbox file, even though Dropbox is selected.