I can totally confirm this.  ElvUI and healbot are all the addons I use with oQ.  When I got elvUI setup this error showed up.

Bump:

Message: Interface\AddOns\oqueue\oqueue.lua:24384: attempt to index field '?' (a nil value)
Time: 04/08/14 08:08:02
Count: 1
Stack: [C]: ?
Interface\AddOns\oqueue\oqueue.lua:24384: in function `paperdoll_set_enchant'
Interface\AddOns\oqueue\oqueue.lua:24457: in function `paperdoll_update'
Interface\AddOns\oqueue\oqueue.lua:24344: in function `paperdoll_overlay'
Interface\AddOns\oqueue\oqueue.lua:24717: in function <Interface\AddOns\oqueue\oqueue.lua:24717>
[C]: in function `Show'
Interface\FrameXML\UIParent.lua:1843: in function `SetUIPanel'
Interface\FrameXML\UIParent.lua:1687: in function `ShowUIPanel'
Interface\FrameXML\UIParent.lua:1569: in function <Interface\FrameXML\UIParent.lua:1565>
[C]: in function `SetAttribute'
Interface\FrameXML\UIParent.lua:2286: in function `ShowUIPanel'
Interface\FrameXML\CharacterFrame.lua:21: in function `ToggleCharacter'
[string "*:OnMouseUp"]:4: in function <[string "*:OnMouseUp"]:1>

Locals: