Does anyone know of any type of random error messages that pop up occasionally?

I was just typing out a message to my buddy, and was deleting a couple letters. The phone kinda stuttered for a second and then a:

"Error with input - system is being retarded" message popped up for a split second.

I am not lying or making this up...

Anyone very familiar with these? I've had mine for almost two years and never seen that message before.
-jonathan