Thanks, but that's not fixed it. When I install it, it does the registration fine, but no books show up. If I then close kindle down and then strt it again, it just sits at the home screen with 'loading' and the sync circle. I've even manually loaded books exactly the same as I did with my HTC Desire, but it doesn't show anything under 'On Device' or 'Archive'. it hooks up to the store OK, and I can swap between 'Home', 'On Device', 'Archive' and 'Store' OK. This is driving me crazy!