For what it's worth, I contacted M technical support yesterday and described the missing buttons issue to them (with screenshot). They said they'd not heard of it before and suggested, if possible, to downgrade to iOS 6 while they look into it.
When you say missing buttons, do you mean missing buttons or missing backgrounds/surrounds?
With iOS7, all buttons are flat, so there is no background. I've posted an example below. There are indeed buttons here, but with the new iOS7 look, their surrounds and backgrounds disappeared. So I'm going to have to do a bit more work to make app intuitive on iOS7. You can see this a bit better in the image strap with the update button. Previously this was on a solid background so stood out, but now I'm going to have to add my own background to make it obviously stand out from the background.
As well as missing flat look, iOS7 treats disabled buttons differently. The 12 button in the example is actually just disabled, which prior to iOS7 would have resulted in a dimmed down button. But in iOS7, by default, it's actually hidden. It's up to the programmer/designer to add more code/images to undo what the new look intends.
![[Linked Image]](https://www.meridianunplugged.com/ubbthreads/gallery/16/medium/1022.jpg)