Line 6 FBV shortboard MK2 does NOT work with iOS7
sorry for the bad news. Juts tried it out today, because i wanted to buy it to use it along with loopy HD in my iPad4 iOS7.
My setup here was: iPad 4 (lightning) iOS7, Lacie Active USB Hub, Apple´s original CCK, Apple´s original 30pin to lightning connector.
I got a phonecall as well today from Line6 Support, telling me, the FBV shortboard MK2 was not made for iOS devices. So there will be no compatibility in the future!
The only Solution would be to downgrade the iPad ti iOS6. From what i heard in several forums, the shortboard mk2 runs like a charm on iOS6.