What is going on with Facebook today?

Today I tried to access facebook, however, it does not work at all. E.g. someone has sent me a message, and I want to open it. However, it only shows the mail I have written to him but NOT his answer.
I have been sent his mail to my normal email address (gmail) so I can read it there. However, why is the conversation not on facebook???

Further I am also constantly being asked to login although I AM ALREADY logged in.

Does anyone else experience issues with facebook?

It's can be an IP issue, your account will be suspended soonish, you did something bad on that account, pm spamming, or too much wall posts, or too low friend acceptance rate, and they are flagged the account.