Hiya mate, I told them I'd retro'd the RNS. I told them I had the problem with the RCD and now the RNS, they didn't say anything about it and they updated the software. Of course they told me they had my stereo on all day and it didn't do it once, on my way home it did it again. That was the first visit, on my second they replaced the Media In unit in my armrest. All seemed fine for a day or 2 but then back to the problem, went in again and they said it was something todo with Apple and I should update my iPod and iPhone. I explained that all my software is up to date to which they replied that my idevices must be broken, they told me to keep an eye on it and take it back if it persisted. I've give up with it now, does seem like it's only Apple devices that make the problem but I could be wrong. The MDI updates seem to have fixed it a little bit, it's not as often now