Just a heads up, for me the Live Stream Widget breaks the Appearance > Widgets section disabling the ability to add any widgets. It's fine if the plugin is disabled and the last block visible is the Live Stream Widget before the page dies. I've attached a screenshot.
Set up is WP MultiSite 3.4.1, lots of WPMUDev plugins, activated on main site but it does it on others too. Nothing is errored out into logs either. Let me know if you need more info – happy to test.