Greg Scown over at Smile:
When you update to iOS 7, you may find that TextExpander doesn’t work in some apps which did work on iOS 6. Due to a change in iOS 7, those apps no longer have access to shared snippets. We have communicated with developers whose apps support TextExpander, and we’ve provided them an updated SDK with a new way to share snippet data. Many developers are working hard to ensure their apps are updated. Bear in mind that review times and other issues are beyond their control.