[SOLVED] Can't login using Opera 12.12

[p4trykx]

Hello
I can't log in using Opera on Linux(maybe Windows too)

I give may login and password push the Login button. They are correct.
I get the page

Quote:You have successfully been logged in.
You will now be taken back to where you came from.

The I get redirected to the main page but I'm not logged in. I tried clearing all the cookies also tried in private mode.
I remember that I logged in without problems a while ago when the forum was assessable by IP address.
Could someone confirm this?