Most of the time when I try to log in I get a msg "Thank you for logging in, haasan. Click here if your browser does not automatically redirect you." But goes back to the same page prompting for user name and password again. Fortunately I did not face the issue today. Is that happening only for my user name? {{or}} This is quite usual in dp.
Well this is because of huge traffic and database access. Just make sure to check keep remember option while you login may reduce these kinda issues. By the way, it is the common issue.