WowAce

What steps will reproduce the problem?
1. log in, the error is instantly there

What version of the product are you using?
r215

Do you have an error log of what happened?
Message: C stack overflow
Time: 08/31/09 17:32:34
Count: 15
Stack: [string "Interface\FrameXML\BasicControls.xml:<Scrip..."]:18: in function <[string "Interface\FrameXML\BasicControls.xml:<Scrip..."]:4>
[C]: ?
[C]: ?
Interface\FrameXML\UIPanelTemplates.lua:343: in function `ScrollingEdit_OnUpdate'
Interface\FrameXML\UIPanelTemplates.lua:320: in function `ScrollingEdit_OnTextChanged'
...e\AddOns\Blizzard_DebugTools\Blizzard_DebugTools.lua:447: in function `ScriptErrorsFrame_Update'
...e\AddOns\Blizzard_DebugTools\Blizzard_DebugTools.lua:412: 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:343: in function `ScrollingEdit_OnUpdate'
Interface\FrameXML\UIPanelTemplates.lua:320: in function `ScrollingEdit_OnTextChanged'
...e\AddOns\Blizzard_DebugTools\Blizzard_DebugTools.lua:447: in function `ScriptErrorsFrame_Update'
...
[C]: ?
[string "safecall Dispatcher[2]"]:13: in function `?'
...ted\libs\CallbackHandler-1.0\CallbackHandler-1.0.lua:91: in function `SendMessage'
Interface\AddOns\Grid2\GridCore.lua:286: in function `?'
...ted\libs\CallbackHandler-1.0\CallbackHandler-1.0.lua:146: in function <...ted\libs\CallbackHandler-1.0\CallbackHandler-1.0.lua:146>
[string "safecall Dispatcher[1]"]:4: in function <[string "safecall Dispatcher[1]"]:4>
[C]: ?
[string "safecall Dispatcher[1]"]:13: in function `?'
...ted\libs\CallbackHandler-1.0\CallbackHandler-1.0.lua:91: in function `Fire'
...\AddOns\Afflicted\libs\AceEvent-3.0\AceEvent-3.0.lua:119: in function <...\AddOns\Afflicted\libs\AceEvent-3.0\AceEvent-3.0.lua:118>

Locals: (*temporary) = <function> defined Interface\FrameXML\BasicControls.xml:<Scripts>:4
(*temporary) = "Interface\FrameXML\UIPanelTemplates.lua:343: attempt to perform arithmetic on field 'cursorOffset' (a nil value)"

Same bug also. Or more precisely, those are Error Frame bugs. See Ticket-21