FYI, with 3974 I couldn't login externally, either directly or via the TVmobili site.
TVmobili was responding on port 30888 and prompting for the username and password, but wouldn't accept it, after three attempts it gives an authentication error:-
Error: 401
Error processing request
That's with both an upgrade, and a remove-clean-fresh install. I've reverted back to 3557 and it's working fine again.
While I'm on, any chance you might ever fix the broken links for the icons? I know it's a fairly minor thing, but they've been broken for ages and make it look really crap. Attempting to access the broken links may also explain why the interface is so sluggish when accessed externally

Here's one example, but the same issue appears regularly through the interface:-
External broken link for "My Content" icon-
http://WANIP.WANIP.WANIP.WANIP:0/__artw ... TVMOBiLi/8Internal working link for "My Content" icon-
http://10.1.2.250:30888/__artwork/b81eb ... TVMOBiLi/8As the links show, the TCP port is incorrect when accessed externally, "0" instead of "30888".

Manually browsing to the link with port "30888" added produces the icon, so it's the link generation that's broken.
Cheers,
Ray Von