With the move to Windows 8 and the new Windows Phone 8 SDK, I apparently ran into a small problem that looks to be fixed now. Unfortunately I did have to roll back the ability to rate on a checkin and will put that out in a future release. I have tested the new release of 0.3.5 on the emulator and my current daily driver (a Nokia Lumia 900) and the app seems to behave as expected.
I want to thank everyone who emailed me to let me know there was a problem. I really appreciate your kind words and support. Makes me more eager to keep working on bringing more of the Untappd experience to Windows Phone!
In other news, I have a Lumia 920 on the way. Once I get all the major features ironed out on the 7.x version, I will look into a Windows Phone 8 specific version to take advantage of the cool new things Windows Phone 8 supports, like live lock screens. What kind of Brew Trak WP8 specific feature would you like to see? Leave a comment and let me know!