This has now been confirmed. Please look on your Manor page under Information and read what GI has said about the issue. They also posted it on the Mystery Manor Facebook page located here http://www.facebook.com/MManorHD
Here is what they said:
We’re all glad to see the new iOS 6.0! Unfortunately, due to its release our game may be temporary unavailable and you'll see a black screen. We’re already working to solve this issue. Update your games immediately upon receiving the relevant message, and you’ll be able to play the games as always. Sorry for any possible inconvenience. You’ll get back the access to our game soon enough!
There is supposed to be an update from GI on 9/21. Of course, we were all hoping for new quests, however, it looks like it will be a fix for IOS 6.0. Still keeping fingers crossed that it will include more quests.