I just upgraded to 3.1, and after refreshing I get the following error:
Fatal error: Call to undefined function wp_cache_get() in /public_html/blog/wp-includes/functions.php on line 336
A quick google search led me to this post on WordPress support forum, however I tried disabling all plugins as suggested, and I'm using TwentyTen as my only theme.
I also set
define('WP_CACHE', false) in the config, didn't help...
Any ideas before I attempt to roll everything back?