I have a networked site that I just updated to WP 3.1.1. My issues:
Atahualpa 3.5.3 won't show post/page content in center column -- header, footer, side panels and widgets are fine.
Moved one site to Atahualpa 3.6.4 and none of the "blank page" fixes seem to work form me; I'm on a university site and can't find the php.ini file -- tried to put one in my site root but that didn't work. Someone suggested there is a fatal error in: wp-content/themes/atahualpa364/functions/bfa_meta_tags.php on lines 2 and 195. Not familiar enough with php to know what the error is.