Anyone else use Mobipocket? I have version 4.8 and the center button will not select menu items. It will work in text to add/remove toolbar, but if you hit menu and scroll using the d pad, the center button will not "click" the highlighted item. This worked fine on the 600 but not on the 650. Also, anyone else notice that changing from the low res version on the 600 to the high res version on the 650 makes all your text really really small....I went back to the low res version. It makes my icons in the toolbar small, but the text is decent sized.