iOS 6: delete series crashes app

[futzle]

This started happening either with my upgrade to iOS6 on my iPhone 4, or with my iPhone 5.  I don't remember which.

1. Have a series recording for a series I lost interest in (in my case, Vegas).
2. Open the iPhone app.  Wait; let it populate the guide.
3. Press My Week.
4. Find Vegas.  Tap it.  Tap Remove Series from recorder.
5. App crashes back to the home screen.

I think it also happens if I just do a Remove Episode.

Other actions like adding new recordings are unaffected.

Edit: I raised a proper support ticket (#19910) for this.