Edit: The host says, no changes from his side for mod_security.
Following is the error
Quote:
Internal Server Error
The server encountered an internal error or misconfiguration and was unable to complete your request.
Please contact the server administrator, webmaster@--------.com 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 500 Internal Server Error error was encountered while trying to use an ErrorDocument to handle the request.
I would call them back and specifically ask if they have made any changes recently, mod_security, anything because for this to come out of the blue with no changes from your end would leave us all to believe it is your Host and/or server setup.