WowAce

If I select all of the units under Units->Global and then click the Bars tab, I get the following error:

[2009/07/30 21:05:06-6114-x1]: ShadowedUnitFrames_Five-v2\five.lua:23: attempt to index field '?' (a nil value)
AceConfigDialog-3.0-34:247: in function <...nfig-3.0\AceConfigDialog-3.0\AceConfigDialog-3.0.lua:195>
(tail call): ?:
AceConfigDialog-3.0-34:1315: in function <...nfig-3.0\AceConfigDialog-3.0\AceConfigDialog-3.0.lua:1035>
AceConfigDialog-3.0-34:1062: in function <...nfig-3.0\AceConfigDialog-3.0\AceConfigDialog-3.0.lua:1035>
AceConfigDialog-3.0-34:1511: in function `FeedGroup'
AceConfigDialog-3.0-34:1432: in function <...nfig-3.0\AceConfigDialog-3.0\AceConfigDialog-3.0.lua:1412>
(tail call): ?:
<in C code>: ?
<string>:"safecall Dispatcher[3]":9: in function <[string "safecall Dispatcher[3]"]:5>
(tail call): ?:
AceGUI-3.0-25 (Ace3):305: in function `Fire'
...ns\Ace3\AceGUI-3.0\widgets\AceGUIWidget-TabGroup.lua:153: in function `SelectTab':
...ns\Ace3\AceGUI-3.0\widgets\AceGUIWidget-TabGroup.lua:82: in function <...ns\Ace3\AceGUI-3.0\widgets\AceGUIWidget-TabGroup.lua:80>:

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Same error under the same circumstances here using v2 in WoW 3.2.0 live with ShadowedUF r20090804.