I suspect the culprit may be this line in nUI_ButtonBar.lua:
Code:
RegisterStateDriver(nUI_ActionBar, "page", "[vehicleui] 12; [overridebar] 14; [bar:2] 2; [bar:3] 3; [bar:4] 4; [bar:5] 5; [bar:6] 6; [bonusbar:1] 7; [bonusbar:2] 8; [bonusbar:3] 9; [bonusbar:4] 10; [bonusbar:5] 11;1" );
It is a sort of lookup table that controls what bar is displayed based on what bar the Blizzard UI says to display.
I have hacked my version so that it doesn't use different bar for Moonkin form, as described here:
http://www.wowinterface.com/forums/s...ad.php?t=46554
Anyway, the statement above is a sort of conditional, which takes the first matching value, and if nothing matches, it uses bar 1 (the default). I notice there is no entry for the tempshapeshift bar (bar 13), so when Blizzard says to load that one, nUI will load bar #1 (I think...).
Edit: Ah, the wonders of Google. It looks like the match for bar 13 was removed to fix some other problem...by Xrystal:
http://www.wowinterface.com/forums/s...8&postcount=16