I am a fairly new WP user. Upgraded today from 2.6.3. to 2.7.
I upgraded by copying files rather than overwriting entire directories so thought I would be fairly safe - did not lose any of my custom themes etc. However when I tried to log on to the site after the upgrade I got the following error message :
Fatal error: Call to undefined function wp_remote_post() in /home/hart7511/public_html/peter/wp-includes/cron.php on line 201
Any help would be appreciated.