I explicitly defined my error pages using the full domain name;
www.lnfnresources.com/error400.shtml
Google now requires you to have "relative" definitions for security reasons, so /error400.shtml will suffice.
Just a little heads up for everyone to double check your verification in Google to see if it still works.
Volunteering to help 
http://www.tbaygeek.ca
My HTML play area
http://www.tbaygeek.ca/test/

http://www.tbaygeek.ca
My HTML play area
http://www.tbaygeek.ca/test/