I made a fresh install of Beta1 and I upgraded the whole repo oss to RC1. The browsers problem is solved and not even have to install the patch for pulseaudio. However, the problem with VLC and Plasma 5 is come back: only top-left quarter of the frames are visible and at VLC exit window manager is out of service. Then I think is non-oss repo component to break the browsers, but Plasma 5 is less stable than with Beta1. Any idea?