500 Internal Server Error

Trying to validate https://www.facebook.com/ (after logged on)




http://validator.w3.org/check#  (done via the right click validate in  
Opera (Opera/9.80 (Macintosh; Intel Mac OS X; U; en) Presto/2.2.15  
Version/10.10) )


Internal Server Error

The server encountered an internal error or misconfiguration and was  
unable to complete your request.

Please contact the server administrator, [no address given] and inform  
them of the time the error occurred, and anything you might have done  
that may have caused the error.

More information about this error may be available in the server error  
log.
Apache/2.2.9 (Debian) mod_python/3.3.1 Python/2.5.2 Server at  
validator.w3.org Port 80