Wordpress: You do not have sufficient permissions to access this page.

I ran around in circles last night trying to figure out the culprit to this Wordpress error

You do not have sufficient permissions to access this page.

I finally ran into this blog this morning... saving my day (more or less literally).
http://beconfused.com/2007/how-to-solve-you-do-not-have-sufficient-permissions-to-access-this-page-in-wordpress/