Nope - still didn't work. Used 26/05 update. Will try 01/06, but otherwise will have to go back to stock 2.3 and go with stock 4.0 update (if it ever comes).
Which still wont solve my Navigator problem (plus there's a few other things I don't like, including the whole Navigator-by-default-when-docking thing, which is a pain in the posterior.)
But hey ho. Looks like I was spoiled by how well CyanogenMod worked with my Milestone!