Ok so on my off time I read at work on my computer through Firefox. And then when I'm at home I read on my Voyage. This issue started about a month or 2 back. What happens is that when I jump on either one they cant find a sync location and the actually error says that if this is the first time you opened the book you will not have a sync or something like that.
Anyone else having this issue and has anyone found a fix?
Make sure you close the Cloud Reader in Firefox when you finish reading on your PC. On your Voyage make sure it has a good Wi-Fi (or 3G if it has that) connection, and when you stop reading you go back to the Home screen before putting it down or turning it off.
Those actions are what causes your last page read to be updated on your Amazon account, which is what is used to synchronize your devices. Assuming you did not turn that feature off in your Settings on your Content and Devices page.