Maybe they even transfer now what client you are using and are blocking any other clients. They must somehow 'upgraded' it (with the phone number and all that stuff) so that I can't log in anymore (I don't have a new account, it is from the time everyone had icq and 56k modems ).

So now my guess is that the guys from icq did something to my acc when I got the server message. But Pidgin is trying to log me in and says my password would be incorrect (which it isn't as you can see above). I finally tried my new password at the icq page in the web app and it worked. At this point I was a bit concerned, because this is not the first time icq got hacked. Then I gave them my phone number (which I can't delete anymore.

Plus I got a server message, that told me that my acc was somehow compromised and that I have to verify my mobile phone number (for whatever reason), with a link to the official icq webpage. I couldn't send any messages at all, but could recieve everything. All began suddenly while chatting with a friend.

Icq account register