What steps will reproduce the problem?
1. open close vendor windows
2.
3.

What is the expected output? What do you see instead?

What version of the product are you using?
r166

Do you have an error log of what happened?
[2009/09/24 10:40:33-17-x26]: Skillet-1.10-LS-163\Inventory.lua:113 attempt to index field 'inventoryData' (a nil value)

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[2009/09/24 10:41:04-17-x2]: Skillet-1.10-LS-163\Inventory.lua:113 attempt to index field 'inventoryData' (a nil value)
<in C code>: in function `CloseMerchant'
Interface\FrameXML\MerchantFrame.lua:52 in function <Interface\FrameXML\MerchantFrame.lua:51
<in C code>: in function `Hide'
Interface\FrameXML\UIParent.lua:1561 in function `SetUIPanel':
Interface\FrameXML\UIParent.lua:1637 in function `HideUIPanel':
Interface\FrameXML\UIParent.lua:1319 in function <Interface\FrameXML\UIParent.lua:1311
<in C code>: in function `SetAttribute'
Interface\FrameXML\UIParent.lua:1960 in function `HideUIPanel':
Interface\FrameXML\UIParent.lua:1964 in function `HideParentPanel':
<string>:"*:OnClick":1: in function <[string "*:OnClick"]:1>

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Please provide any additional information below.