I have had mine for a year. Mine doesn't have any color issues. Its even and perfect. And yes, I'd know what issues look like as I had many with the PW1.
But I am glad I have one of the good ones. Sounds not like any update, but more of a making sure those going out are checked well? Guess mine was checked a year ago.
If anything were to happen to my Voyage, I would buy another one right away. I like it that much. The screen, the design, the feel and the buttons. No other e-ink device out there has all the features and customer service. So for me is a no-brainer. But mine still works fine so I don't need another one.