I am attempting to install using installer 220.127.116.11 on OSX version 10.9.1
The installer requests that I quit Safari, wich I have done, but it will not continue.
I have quit the installer and relaunched. checked in the Force Quit list to make sure Safari is not listed there, it is not.
Have others seen this behavior?
Do you use "MenuTab"? It's a menubar plugin for Facebook.