Multiple errors when posting

Hey Guys,

I’m having troubles ever since I’ve upgraded. When I try to post, I get a white page with the errors bellow. I’ve disabled all plugins, installed from scratch, I still get these errors.

I would appreciate any help.

Warning: Invalid argument supplied for foreach() in /home/zeno/public_html/wp-admin/includes/post.php on line 227

Warning: array_search() [function.array-search]: Wrong datatype for second argument in /home/zeno/public_html/wp-admin/includes/post.php on line 326

Warning: Illegal string offset: -1211911650 in /home/zeno/public_html/wp-admin/includes/post.php on line 333

Warning: Cannot modify header information - headers already sent by (output started at /home/zeno/public_html/wp-admin/includes/post.php:227) in /home/zeno/public_html/wp-includes/classes.php on line 788