No idea if its global, but judging from HBO Adria Tech Suport yesterday, they already were aware of the situation.
I saw somewhere (on their FAQ section probably) that there might be a problem when the App is upgraded, but not immidiatelly adjusted for all devices.
Anyway, Atila got me slightly optimistic if it woks for him now - I'll give another try.
Meanwhile, does anybody know when the the latest App version went on?
I get YouTube upgrades all the time, but I missed any development on HBO GO App (possibly because I haven't even try it before yesterday).