Joshbula,
If you are getting: Warning: Cannot modify header information – headers already sent by (output started at … wp-config.php:47) in … /wp-includes/pluggable.php on line 770
check your wp-config file to see if there is a newline character at the end of the endtag %>
The same thing happened to me and there was an extra newline at the end of the tag. It was really undetectable and I wasted a ton of time on it.