If you want to just fix the Flash issue and get your HULU buttons back, try this: I am using Compiz as my window manager. If you are using Compiz and don’t have the Compiz Fusion Icon installed, install it with Synaptic and add it to your startup items. This will place a Compiz cube icon in your panel. Any time you experience the issue, just right-click the cube and choose “Reload Window Manager.” That will fix the issue, but not permanently. You will probably have to repeat this process in future sessions, but at least you can use Flash controls while you experiment with the longer term solutions listed above.