Error when signing up for comps

[Cliffside]

Using en masse sign up to enter my pets into the Might Competition I get this..

Internal Server Error

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

Please contact the server administrator, webmaster@secundi.net 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.

Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.
Apache mod_fcgid/2.3.5 mod_auth_passthrough/2.1 mod_bwlimited/1.4 FrontPage/5.0.2.2635 Server at www.secundi.net Port 80

I have checked and it did still sign my pets up in the comps so I'm not sure what the error is about, but thought I should report it in case it's important somewhere/how.  Also I should note that using en masse sign up for totality worked just fine.  And too, en masse sign up for all my pets on another account worked just fine (including Might comp) it just seems to happen for this account.