What is the 503 Service Unavailable message?

[Kimmielee]

Is it just me or is anyone else seeing this?

 

[fan of the TTA]

it means that the server is having problems.

and yes...i get it all the time

 

[2Xited4Disney]

I've been getting it alot too

 

[byoung]

I haven't seen it at all.