[5.03.00 Dev] Button Bag Error

[Petrah]

I get this error when I click on the down arrow button inside of the button bag:

[2009/05/07 01:24:29-323-x1]: Interface\FrameXML\UIDropDownMenu.lua:689: DropDownList1:SetPoint(): Couldn't find region named 'nUI_ButtonBagLeft':
Interface\FrameXML\UIDropDownMenu.lua:689: in function <Interface\FrameXML\UIDropDownMenu.lua:576>:
<in C code>: in function `ToggleDropDownMenu'
<string>:"*:OnClick":1: in function <[string "*:OnClick"]:1>

After closing Bugsack and closing the button bag, when I went to open the button bag again, the down arrow button disappeared. Including the calendar, there's only 7 buttons inside the bag and I'm not sure if I'm missing any since I seldom go in there. I was trying to see if I could recreate the bug, but I can't even get that arrow button again atm. Tell me if you need more info!