Chat windows broken - LUA error ?

My chat windows (well, really at this point, my chat window) are borked. I don't have tabs on top of the window ... can't create, move, resize, delete.

i have repeatedly deleted all addons, addon folder, cache folder, interface folder, and WTF folder. When i start WoW I have to change the resolution (expected that) --- but the error persists.

enabled the list LUA errors and got the following:


Message: Interface\FrameXML\UIPanelTemplates.lua:365: C stack overflow
Time: 01/25/10 22:06:43
Count: 1
Stack: Interface\FrameXML\UIPanelTemplates.lua:365: in function `ScrollingEdit_OnUpdate'
Interface\FrameXML\UIPanelTemplates.lua:342: in function `ScrollingEdit_OnTextChanged'
...e\AddOns\Blizzard_DebugTools\Blizzard_DebugTools.lua:449: in function `ScriptErrorsFrame_Update'
...e\AddOns\Blizzard_DebugTools\Blizzard_DebugTools.lua:413: in function `ScriptErrorsFrame_OnError'
[string "Interface\FrameXML\BasicControls.xml:<Scrip..."]:18: in function <[string "Interface\FrameXML\BasicControls.xml:<Scrip..."]:4>
[C]: ?
Interface\FrameXML\UIPanelTemplates.lua:365: in function `ScrollingEdit_OnUpdate'
Interface\FrameXML\UIPanelTemplates.lua:342: in function `ScrollingEdit_OnTextChanged'
...e\AddOns\Blizzard_DebugTools\Blizzard_DebugTools.lua:449: in function `ScriptErrorsFrame_Update'
...e\AddOns\Blizzard_DebugTools\Blizzard_DebugTools.lua:413: in function `ScriptErrorsFrame_OnError'
[string "Interface\FrameXML\BasicControls.xml:<Scrip..."]:18: in function <[string "Interface\FrameXML\BasicControls.xml:<Scrip..."]:4>
[C]: ?
...
[string "Interface\FrameXML\BasicControls.xml:<Scrip..."]:18: in function <[string "Interface\FrameXML\BasicControls.xml:<Scrip..."]:4>
[C]: ?
Interface\FrameXML\UIPanelTemplates.lua:365: in function `ScrollingEdit_OnUpdate'
Interface\FrameXML\UIPanelTemplates.lua:342: in function `ScrollingEdit_OnTextChanged'
...e\AddOns\Blizzard_DebugTools\Blizzard_DebugTools.lua:449: in function `ScriptErrorsFrame_Update'
...e\AddOns\Blizzard_DebugTools\Blizzard_DebugTools.lua:413: in function `ScriptErrorsFrame_OnError'
[string "Interface\FrameXML\BasicControls.xml:<Scrip..."]:18: in function <[string "Interface\FrameXML\BasicControls.xml:<Scrip..."]:4>
[C]: ?
Interface\FrameXML\UIPanelTemplates.lua:365: in function `ScrollingEdit_OnUpdate'
[string "*:OnUpdate"]:1: in function <[string "*:OnUpdate"]:1>

Locals: self = ScriptErrorsFrameScrollFrameText {
0 = <userdata>
text = "Message: [string "UIErrorsFrame:UnregisterEvent(”UI_ERROR_MESSAGE”);"]:1: unexpected symbol near '?Time: 01/25/10 22:06:43
Count: 1
Stack: [C]: in function `RunScript'
Interface\FrameXML\ChatFrame.lua:1897: in function `value'
Interface\FrameXML\ChatFrame.lua:3565: in function `ChatEdit_ParseText'
Interface\FrameXML\ChatFrame.lua:3213: in function `ChatEdit_SendText'
Interface\FrameXML\ChatFrame.lua:2304: in function <Interface\FrameXML\ChatFrame.lua:2297>
[C]: in function `UseAction'
Interface\FrameXML\SecureTemplates.lua:310: in function `handler'
Interface\FrameXML\SecureTemplates.lua:529: in function `SecureActionButton_OnClick'
Interface\FrameXML\ActionButton.lua:40: in function `ActionButtonUp'
[string "ACTIONBUTTON3"]:4: in function <[string "ACTIONBUTTON3"]:1>

Locals: (*temporary) = "UIErrorsFrame:UnregisterEvent(”UI_ERROR_MESSAGE”);"
"
handleCursorChange = true
}
elapsed = 0
scrollFrame = ScriptErrorsFrameScrollFrame {
0 = <userdata>
offset = 0
}
height = 193.99998045976
range = 0
scroll = 0
size = 193.99998045976
cursorOffset = nil
(*temporary) = nil
(*temporary) = ScriptErrorsFrameScrollFrame {
0 = <userdata>
offset = 0
}
(*temporary) = 0
(*temporary) = "attempt to perform arithmetic on field 'cursorOffset' (a nil value)"
(*temporary) = <function> defined =[C]:-1
(*temporary) = "Interface\FrameXML\UIPanelTemplates.lua:365: attempt to perform arithmetic on field 'cursorOffset' (a nil value)"
(*temporary) = "C stack overflow"


any advice on where to start would be appreciated. thanks.