I could for some reason not login to my server running FW 1.3.3 after the app upgrade. The login opened the permission screen, but after granting access the web page just sat there with a spinner and never returning to the app.
Only after upgrading to FW 1.4.0 it worked again.
I'm on my mobile only right now and could not fully check what error (if any) was happening server side. But is this something someone else experienced as well?