500 Servlet Exception? Plz Help.

I keep haveing this happen to me no matter what server i try to log on.

java.lang.NullPointerException

If you have any ideas why this is happening and/or how to stop it I would greatly
apprecite it if you posted it below.

Minecraft classic is down because Notch and his fellow friends are still working out the kinks.

i know i keep on getting that aswell, it always bugs me!

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and im getting other erros, like not being able to get on the multiplayer bit its so annoying, help me!

Ok thank you

well obviously the error is a null pointer which is one of the biggest nono's in programming