Just when you thought you could go on rooting and switching ROMs with impunity, it turns out you can't -- at least, not if you want to continue enjoying your Google Music account. Watchful eyes at XDA Developers have discovered a snag in Google's authorization system, which means that not only is there an upper limit of ten devices that can be authorized simultaneously, but there's also a limit of four de-authorizations per year. Since every time you flash your phone or tablet counts as a new authorization, an
