Aha! I think that just means that too many of us are clicking on the same thing at the same time. The server can only spit out so much at once. I get that at peak times too.

(edit) You will also get that if there are characters in a cut-n-paste that the server doesn't recognize.

Characters like δ ζ ♥ Δ Φ ¥ ® © ™ will copy over but a few of the odd ones will not, and the error message shows up.  Matts has to be careful of Swedish characters that won't copy over.