I have installed the dropbox zimlet with the updated zimbraDropBox.js file as found in GitHub here.
Attaching to an email works as expected, I click on the Attach drop down, select Dropbox and a new window appears giving me access to my Dropbox account.
The problem arrises when I'm trying to upload a file that's attached to a received email. The link "Dropbox" appears to the right of the file along with "Preview", "Download", "Briefcase" and "Remove" but when I click on it a new window doesn't appear.
I have tested this with both Chrome and Firefox on both Win7 and Ubuntu 15.04.
Can anyone suggest a fix, or should I be posting on GitHub?