WordPress 3.8 keeps asking me to upgrade to 3.8

Don’t use the update now button, use a full on download of the core WP – http://wordpress.org/download/ – and then make sure you flush any cache you’ve got running. Do you have memcached or APC or xcache? Purge that. Plugins ditto.

I saw that on one of my sites where my server’s object cache hung on to things. I went and checked the readme.html and verified I WAS on the right version, so I knew it had to be cached somewhere.