I have the same version of 1password installed on an iMac, an Mac Mini and a MacBook Pro, all running 10.6.8 and using Safari with the plugin. On two of them, in the popup, using the 'Edit' right button shows the details of an entry as expected. On the Mini, for one account, it shows data for a different entry instead instead - sometimes example data. The data is shared over Dropbox, so it's the same file. The three copies of the main app all work identically.