Using wordpress 3.0 and Flexibility Theme 1.1.  My home page works find but if I click on any categories, I get the following message.

Access forbidden!

You don't have permission to access the requested object.
It is either read-protected or not readable by the server.

I have verified my permission are set correctly.  All my previous builds using Flex 1.1 and WP 3.0 did not experience this problems.  No changes in the plugins.  I am at a lost as to how to fix this.