I don't know if this has already been discussed, but I just came across it last night.
My iPhone 5s iOS 8.1.3 was open to Indigo Touch when a notification [email] came in. The notification appeared at the top of the screen [portrait view], and when it disappeared it left a black banner that is now on every Touch screen. Re-starting the app doesn't fix it. All other apps are unaffected.
It also looks like it added the permanent black banner to the bottom, as the screen shot shows