Major Problem with Keyboard Shortcuts in iOS 7
There's a significant issue with keyboard "Shortcuts" after upgrading to iOS 7. If you try to access the shortcuts (Settings > General > Keyboard > Shortcuts), it may not let you and may instead "kill" the Settings app and return you to your home screen (it may let you in at first, but will kick you out after about 30 seconds). I have done a lot of testing and have been on with Apple for about 3 hours (the guy was great, even though we weren't able to fix it yet).
We determined that you may experience this problem if:
1. You are running iOS 7 and either (a) upgraded from iOS 6 to iOS 7, or (b) have restored from a device that either ran iOS 6 or was upgraded to iOS 7
AND
2. if you have turned "On" the option under iCloud to sync "Documents and Data"
The Apple rep was ultimately able to replicate the issue and it was through the testing that we reached the above conclusions. You may be able to go into Shortcuts at first (by tapping the Shortcut button), but after a few minutes it may kick you out and send you to the Home screen. If that happens, you won't be able to get back into the shortcuts. Post here if you experience this issue, or if you have any additional info. Apple is actively looking into it and hopefully we'll get a fix soon.