Hi all. Might be able to shed a bit of light. Any Iphone 4 users that get a crackly/delayed/distorted sound when playing through headphones - reset latency to 20ms, unplug headphones, then plug them back in. Sound returns to normal, although still a bit clicky/poppy. Unfortunately, this method doesn't seem to help with the IPAD. No matter what you do, I can only hear my guitar through my IPAD's built in speakers once the headphones are disconnected, even when changing microphone settings in 'privacy' menu. Very dissapointed with Line 6. All other mobile software apps (JamUp Pro especially) seem to have prepared well for the IOS 7 update with the exception of Mobile In!!