Alright, here we go. First of all there are a few things that will render the MENU function inoperable for sure. They are: switching from music to video on the ipod and back again will give you no MENU function, unplugging the ipod and plugging it back in will give you no MENU function, and turning your car off and on again will give you no MENU function. However, starting a new search using one of the five search tabs at the top of the ipod interface on the D3 will regain you the MENU function.
Alright heres what I found. The dead MENU has less to do with the MENU button then the ESC button it gives you when you touch it as well as how far back you go in the search. Basically if you hit the MENU button and go all the way back to the beginning of the search then hit the ESC button you will loose the MENU function until you start a new search with one of the five search tabs at the top.
Lets use the ARTIST tab as an example. If you select ARTIST then select the album you want then the song it will play of course. You can then hit MENU and you will get two buttons at the bottom, BACK and ESC. You can freely go back and select another song or go back one more step and select another album and still have access to the MENU function for other searches. You can also hit MENU and hit ESC at any point and still have the MENU function. Now, if you hit MENU and go all the way back to the original search category, in this case ARTIST and hit the ESC button you will loose the MENU function until you start a new search with one of the five search tabs at the top.
So to recap, as long as you dont go all the back to the original search category after hitting the MENU button and then hit the ESC button you will be able to use MENU continuously without it failing to work.
Now these are the results that I got on my system after playing around with it extensively last night and several hours today. What we all need to do for the people that have reported the MENU issue on this site is to do exactly what I did and see if you get a different result, these are the steps:
1. On the ipod source hit ARTIST
2. Select an album of your choice
3. Select a song of your choice
4. Hit MENU, you will see the list of songs, go back one step, you will see the list of albums.
5. Hit ESC
6. Hit MENU again, this time it will only display the list of albums, hit BACK till it displays the list of artist, hit ESC.
7. Hit MENU again and it will not work.
This is apparently how it works for all search tabs, as long as you dont go all the way back and hit ESC you should be able to maintain the MENU function.
If anyone gets a different result post what you got and how you did it and also the ipod model you are using. However I think this is the solution to the problem. Let us all know what you find. This only takes about two minutes to verify.