The only real issue I've had with the AR2 is the screen blackout linked to Pandora. I think this is actually a Pandora problem and not the AR2. I haven't noticed this problem with any other app.
The AR2 also seems to work much better if I start the car and turn on the AR2, then start the APP Radio APP on my Iphone and then connect the cable.
I also purchased the $10 gadget on Ebay to enable video in motion, this works great with no issues at all.
For what its worth I have a 4S with IOS 5.1 NOT jailbroke. And all the other APP's that I've tried have worked great for me.
What are your latest issues with the AR2?