Having the same problem as Operauser12356 here.
It started randomly yesterday(May 25th), refreshes would sometimes fix it, now it's just stuck to the old version.
I have latest Opera installed and use 2 extensions: adblock and Gmail notifier.
Running on windows 7 64 bit with latest security updates.
Tried clearing cookies, didn't work.
Also tested on IE and Chrome, no problem with those 2 browsers.