I think they're making some server adjustments. I would assume that the servers need to be tweaked all the time, but I really don't know. I would venture to guess that the site is probably always under hacker attack, but I believe it is very secure. The thing the other day was a search for email addresses, but I believe it failed. The guy who did it was IP banned. Of course, for other reasons, it never hurts to change your password, either here, or anywhere.