Ok so it started not tilting about two days ago, I Bing something and after I see a video on YouTube it would usually let me flip the screen. Anyways, when I push the back button, it goes back to Bing and the screen stays tilted even if I flip the phone upright. The only way to get it back to normal is by pushing the power button and shutting the screen off. When it comes back on it tilts upright automatically. MetroTube doesn't let me tilt the screen neither. Any ideas?