Bad Category response to update

My business is listed in Shopping/Pets (arcatapet.com). An attempt to update that listing today resulted in the following response:

Bad category

You may not submit your site to this category.

Please go back in your browser if you need to resubmit the form.

The URL was http://dmoz.org/cgi-bin/update3.cgi

Any ideas?

I've confirmed this is a dmoz software bug and have alerted our technical staff to the problem. You may watch this thread for further updates.

This bug has been fixed. Please try submitting your update request again.