2nd gen nano not recognized by MBA / Lion 10.7.4 / iTunes 10.6.3

Question

I have this 2nd gen nano (and a bunch of other ones) set to manage music manually. This particular device has worked fine while connected to MBP mid 2010 running SL and most recent iTunes.
But, this 2nd gen nano does not show up on the MacBook Air, mid-2011, running Lion 10.7.4, iTunes 10.6.3.
I have reset the nano. It plays fine, responds to setting changes properly and it does charge while plugged into either USB port of the MBA.  The computer is plugged into wall juice, and the other USB port is not in use while I try to get the nano recognized. 
Disk utility does not see it either.
This MBA is not the computer I usually sync this 2nd gen nano to since that machine (the MBP mid 2010) is out for repair.
i expected iTunes on this MBA  to just mount the thing (since the iPod has the manual preference set, and is a Mac-formatted nano) and that it would then let me delete a few picks and drag a few newer tunes onto it.   
The MBA, the nano and my out-for-repair MBP all have the same Apple ID associated with purchased music on the devices.
I rarely reload this nano and haven't actually changed its music since I put the MBP to Lion, so I am not sure if it's Lion, iTunes or the MBA that is the issue with this 2nd gen nano.
After the 2nd nano would not mount, I tried two other iPods, one is a 3rd gen nano and the other is a Classic.   Both of them connected fine and let me drag stuff onto them.
So it seems that either Lion 10.7.4 or iTunes 10.6.3 does not feel like recognizing the 2nd gen nano.  Hope this can be fixed.  That model nano is practically indestructible and there are still lots of them out there!

Answer 1

Update on the above:
I did some more research on this using assorted of my 2nd gen nanos and a couple 1st gen ones as well. 
It's only the 2GB 2nd gen nanos  MA477LL part number, that do not work with Lion / 10.7.4 / iTunes 10.6.3.
2nd gen MA477LL  does not work, it's a 2GB model. I have two of these.  Neither works.
2nd gen MA428LL  works  it is a 4GB model
2nd gen MA426LL  works  it is a 4GB model
1st gen MA352LL  works - it's a 1st gen nano refurb (1GB)
1st gen MA350LL  (1GB) - this is another 1st gen nano refurb, but one that's formatted for Windows (and had nothing on it when I connected it).  For some reason it mounted fine in Mac iTunes environment and even let me drag an AAC track onto it.  I was dumbfounded.   On the desktop, its sys info showed info like any FAT32 flashdrive but it did have an iPod nano icon on it.   I ejected it from iTunes and plugged in a pair of earbuds and hit play on the track. It plays fine.   Go figure!  I rechecked the settings in the device.  It does say Windows for the format. I feel like I'm in the Bermuda triangle.  I might have to reformat it next time a Windows iTunes setup sees that nano though.
So bottom line here with the second gen nanos:    it's the 2GB model, the 2nd gen nanos with model MA477LL that do not work in Lion and iTunes 10.6.3 for whatever reason.   Both of my devices with that model number do work fine on an older MBA running Snow Leopard and iTunes 10.4.