Aaaaaargh!!!! <<<< sound of own hair being ripped out.
Last november I changed the permalink structure for my archives.
WordPress is making available the older archives - prior to that change - under the old permalink structure but trying to link to those archives using the new permalink structure.
http://freedomforall.net/?m=200506 is the old permalink structure and that page displays the June 2005 archives (STILL).
http://freedomforall.net/2005/06/ is the new permalink structure and links are being displayed in this structure however when you try to click on any of the archive links prior to the permalink structure change you get an access denied error.
I dont think this is due to .htaccess issues as the page under the old structure still displays.
Hope there's an easy answer :D