I currently have iOS 5 Beta 7 on my iPad 2 and iPhone 4. Just as the title says, I cannot seem to figure out why Youtube/Twitter web apps are not working and have never worked. Twitter has the twitter logo flash on the screen and then I am taking to a cloth background with a black bar at the top and a skinny thing in the top left. It stays like this and goes no further. Youtube's mobile site takes me to blank page.