I've just started noticing some odd "flickering" going on my my iPronto screen.....everything is working perferctly, but sometimes the screen will dim a bit for just a second or two, and other times, there are a few odd lines that will appear and flicker for a second. This can happen either on AC or DC. It did not used to happen. Has anyone had screen failure on the iPronto yet, and if so, did you notice any of these types of symptoms? ? I've owned mine since the product was first released and never had this type of problem before. Thanks for any input