FYI, I was able to successfully install this update from CWM 18.104.22.168 (latest as per ROM Manager) and I DID NOT need to restore stock recovery with Odin first, did it all while sitting on the couch watching TV
Here's "the trick", I think... after flashing the update in CWM as you would any update ZIP I then I selected "Reboot Recovery" from CWM menu... then when I got back into CWM I selected "Reboot System"... CWM at this point told me I might lose recovery so I let it fix that... then it said I might lose root, so I let it fix that too... system then rebooted and all was right with the world: MA6, root and CWM still there
Frank W. Zammetti
Author of "Pro iOS and Android Apps for Business"
and "Learn Corona SDK Game Development"
and "Practical Palm Pre webOS Projects"
and "Practical Ext JS Projects with Gears"
and "Practical Dojo Projects"
and "Practical DWR 2 Projects"
and "Practical Ajax Projects with Java Technology"
Creator of the mobile game Engineer (www.etherient.com
For all things me, visit www.zammetti.com