I have just updated wordpress to 3.8.1 and visual editor not working in page and post. I have tried with following solutions but none of them works for me.
-Activate and deactivate all plugin.
-installed Use Google Libraries plugin.
-Changed theme.
-unchecked in user profile for "Disable the visual editor when writing".
-cleared browser cache.
-Reinstalled wordpress.
-added this line to wp-config.php define('CONCATENATE_SCRIPTS', false );
Thanks for replay. I have solved this issue by manually download wordpress 3.8.1 and uploaded wp-admin and wp-includes folders using ftp. Now its working nicely.
disable and re-enable the Yoast SEO plugin,