My blog has crashed.

I updated to version 2.6.2 and had a few problems. My backup turned out to only have a few files saved on my server so I attempted to do new install from scratch, but kept my plug-in and image files.
Most of my links were lost, but my database was sound.
When I attempted to edit a post and update it I get:

Warning: Cannot modify header information – headers already sent by (output started at /home/geekol2/public_html/blog/wp-config.php:47) in /home/geekol2/public_html/blog/wp-includes/pluggable.php on line 770

This message pops up everywhere and has basically crippled my site.

Anyone have any insight on how to fix this?

My site is at http://www.geekologist.com/blog