I have been trying various methods to interface a custom login function with the core Login controller, including replacing it completely with my package (http://pastie.org/2020742). The issue now is that When i try to logout, it get a Page Not Found error. The Login page is still there and working, but I am unable to log out. Any help would be greatly appreciated!

Oh one other nuance i noticed is when this started happening, i was actually getting an error:

Cannot redeclare class PageNotFoundController in /concrete/controllers/page_not_found.php on line 12

I just commented out that entire controller file and it fixed it, but I thought that was odd as well..