I had a similar bug. Even checking the box didn't help, as I always had it checked. But somehow, a miracle happened, and I was able to log in... However, vbn is having problems; he still can't log in :(
So, maybe forum members who have encountered this problem should be advised to try this workaround via ICQ/email: they should try saving their password in the browser and then try logging in. It might help someone.
Думающий поймет. Действующий совершит. Дорогу осилит идущий ©