Reproduce steps:

1. Create in apache new virtual host with .dev zone (like example.dev)

2. Insert this domain in hosts file

3. Create test index.html page on this domain and init jQuery on it.

4. Try to fire .mousemove() - method fails with exception

Uncaught TypeError : Cannot read property 'handler' of undefined

But if you change domain name of your virtual host to example.com - all works fine.