I have just installed the latest version (11.4.402.265) and now when I right-click to view my settings, the whole window freezes. I can't click on any of the controls or close the settings popup. The only way to get rid of it is to refresh the browser window.
I am running Mac OSX 10.6.8, and it happens in Firefox, Safari and Chrome (with default flash plugin disabled).
This did not happen with 11.3 (which is the version Chrome is running when enabled).