iPod Shuffle Pt 2

I'm still impressed by this device, but I've discovered two things that annoy me so far. First, the slider bar to turn on the device is sometimes difficult to slide, there isn't a grip or edge to grab with your thumb. If you hands are dry then your thumb won't catch and slide the bar down to turn it on. Second, I can download songs on it with one computer, but when I plug it into a second computer to play the songs off the iPod Shuffle (not copy the songs to the second computer, just play the songs off the device) it won't let me because it's linked with another computer. I hope Apple will fix this with a software/firmware update.