I just upgraded my M001 to 1.7.4 - upgrade went perfectly, YouTube is now available as well as several new features. However, the icons at the top of the screen (home, back button, menu, etc.) do not work. Everything else works perfectly. Also there seems to be a new icon, kind of like an eye (or maybe a hurricane?). What does that do. Of course, it does not respond to my touch either. Screen calibration seems to be fine, in fact it improved when i installed 1.7.4. What is up?