Well, I left a comment in the App store on Opera Mini review, linking this thread.
I gave 3 stars because I don't want to pull Opera down but I was hoping to raise some attention. It has not been approved or answered yet.
Does anyone have any idea what might cause this problem? Is there anything that requires some special setting on the user's side? I just faced this recently after I got my iPad. And I was fool enough to log out of Opera Mini on my iPhone, you know "just to test some things"... Now I'm completely out and lost. Such a dispair!