Error got when trying to enable/disable units

Message: ...nterface\AddOns\ShadowedUnitFrames\modules\auras.lua:593: attempt to index field 'buffs' (a nil value)
Time: 04/20/10 22:53:42
Count: 2
Stack: ...nterface\AddOns\ShadowedUnitFrames\modules\auras.lua:593: in function `?'
...nterface\AddOns\ShadowedUnitFrames\modules\units.lua:17: in function `FullUpdate'
...terface\AddOns\ShadowedUnitFrames\modules\movers.lua:147: in function <...terface\AddOns\ShadowedUnitFrames\modules\movers.lua:136>
...terface\AddOns\ShadowedUnitFrames\modules\movers.lua:251: in function `Enable'
...terface\AddOns\ShadowedUnitFrames\modules\movers.lua:404: in function `Update'
Interface\AddOns\ShadowedUF_Options\config.lua:3605: in function <Interface\AddOns\ShadowedUF_Options\config.lua:3597>
(tail call): ?
[C]: ?
[string "safecall Dispatcher[2]"]:9: in function <[string "safecall Dispatcher[2]"]:5>
(tail call): ?
...nfig-3.0\AceConfigDialog-3.0\AceConfigDialog-3.0.lua:796: in function <...nfig-3.0\AceConfigDialog-3.0\AceConfigDialog-3.0.lua:611>
(tail call): ?
[C]: ?
[string "safecall Dispatcher[3]"]:9: in function <[string "safecall Dispatcher[3]"]:5>
(tail call): ?
...e\AddOns\ButtonFacade\Libs\AceGUI-3.0\AceGUI-3.0.lua:326: in function `Fire'
...wn\Libs\AceGUI-3.0\widgets\AceGUIWidget-CheckBox.lua:69: in function <...wn\Libs\AceGUI-3.0\widgets\AceGUIWidget-CheckBox.lua:58>
 
Locals: self = <table> {
 OnDisable = <function> defined @Interface\AddOns\ShadowedUnitFrames\modules\auras.lua:18
 updateButton = <function> defined @Interface\AddOns\ShadowedUnitFrames\modules\auras.lua:212
 UpdateFilter = <function> defined @Interface\AddOns\ShadowedUnitFrames\modules\auras.lua:466
 scan = <function> defined @Interface\AddOns\ShadowedUnitFrames\modules\auras.lua:476
 OnEnable = <function> defined @Interface\AddOns\ShadowedUnitFrames\modules\auras.lua:8
 OnLayoutApplied = <function> defined @Interface\AddOns\ShadowedUnitFrames\modules\auras.lua:319
 moduleKey = "auras"
 moduleName = "Auras"
 Update = <function> defined @Interface\AddOns\ShadowedUnitFrames\modules\auras.lua:584
 anchorGroupToGroup = <function> defined @Interface\AddOns\ShadowedUnitFrames\modules\auras.lua:553
}
frame = SUFUnittarget {
 highFrame = <unnamed> {
 }
 configMode = true
 portrait = <unnamed> {
 }
 UnregisterAll = <function> defined @Interface\AddOns\ShadowedUnitFrames\modules\units.lua:91
 isDead = false
 auras = <table> {
 }
 registeredEvents = <table> {
 }
 powerBar = <unnamed> {
 }
 RegisterNormalEvent = <function> defined @Interface\AddOns\ShadowedUnitFrames\modules\units.lua:22
 SetVisibility = <function> defined @Interface\AddOns\ShadowedUnitFrames\modules\units.lua:173
 healthBar = <unnamed> {
 }
 RegisterUpdateFunc = <function> defined @Interface\AddOns\ShadowedUnitFrames\modules\units.lua:64
 unitType = "target"
 SetRangeAlpha = <function> defined @Interface\AddOns\ShadowedUnitFrames\modules\units.lua:123
 visibility = <table> {
 }
 indicators = <unnamed> {
 }
 unitInitialized = true
 isUnitVolatile = true
 unit = "target"
 hasStateWatch = false
 RegisterUnitEvent = <function> defined @Interface\AddOns\ShadowedUnitFrames\modules\units.lua:58
 comboPoints = <unnamed> {
 }
 topFrameLevel = 5
 originalOnLeave = <function> defined @Interface\FrameXML\UnitFrame.lua:136
 originalOnEnter = <function> defined @Interface\AddOns\ShadowedUnitFrames\modules\units.lua:551
 originalUnit = "target"
 unitRealType = "target"
 unitOwner = "target"
 DisableRangeAlpha = <function> defined @Interface\AddOns\ShadowedUnitFrames\modules\units.lua:115
 originalMenu = <function> defined @Interface\AddOns\ShadowedUnitFrames\modules\units.lua:332
 fullUpdates = <table> {
 }
 UnregisterUpdateFunc = <function> defined @Interface\AddOns\ShadowedUnitFrames\modules\units.lua:81
 combatText = <unnamed> {
 }
 0 = <userdata>
 FullUpdate = <function> defined @Interface\AddOns\ShadowedUnitFrames\modules\units.lua:14
 portraitModel = <unnamed> {
 }
 UnregisterSingleEvent = <function> defined @Interface\AddOns\ShadowedUnitFrames\modules\units.lua:41
}
conf