Yeah i have been having problems too. There is a new update to JAVA which has just come out and it might take a little while for everyone's computers to sync up and work. Try updating JAVA (if you do not know how, just search "java" in google and go the the download section of the first result) and then restarting your computer.
That is the only thing i can think would cause this sort of irregular outage.
Hope it helps, i'm going to try it now.
