Hi Brian and Jonathan,
Jonathan covered all the points I would cover. When I uploaded the new build with iOS7 compatibility I also added native iPad compatibility, thinking it would make better use of the larger screen size. But there’s a difference in the way iPod and iPhone handle screen rotation that I didn’t account for, so the app is not receiving the notification to turn on the graph display. All the graphing code is actually still in the iPad build of the app, it’s just not being accessed. Quite frustrating.
I’m working on getting the new build submitted to the app store today, but Apple has a 1-2 week approval process for all new builds. If you wanted to register for the testflight beta program (be sure to register your device as well) I can probably get you a beta sooner.
Sorry for the inconvenience, all the best.