What steps will reproduce the problem?

We where in Molten Core and i looted Ragnaros, then the error appeared

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

exspected: no lua errors
instead:

Date: 2009-11-25 14:41:35
ID: 1
Error occured in: Global
Count: 14
Message: ...ingBuster\libs\LibStatLogic-1.1\LibStatLogic-1.1.lua line 12430:
   attempt to index field '?' (a nil value)
Debug:
   (tail call): ?
   [C]: ?
   ...ingBuster\libs\LibStatLogic-1.1\LibStatLogic-1.1.lua:12430 GetSum()
   RatingBuster\RatingBuster.lua:4405 StatSummary()
   RatingBuster\RatingBuster.lua:2796 handler()
   ...ingBuster\libs\LibTipHooker-1.1\LibTipHooker-1.1.lua:168
      ...ingBuster\libs\LibTipHooker-1.1\LibTipHooker-1.1.lua:163
   [C]: SetLootItem()
   ..\FrameXML\LootFrame.lua:198 LootItem_OnEnter()
   [string "*:OnEnter"]:1:
      [string "*:OnEnter"]:1
AddOns:
  Swatter, v5.1.DEV.213
  WowheadLooter, v30203
  NPCScan, v3.2.0.8
  NPCScanOverlay, v3.2.0.4
  Altoholic, v3.2.003
  Babylonian, v5.1.DEV.130
  BadBoy, vv4.0.0.1
  BadBoyCCleaner, v2.1.3
  BadBoyLevels, v2.1.2
  BagnonForever, v1.1.2
  BagnonTooltips, v
  BeanCounter, v5.1.DEV.4475
  BigWigs, v3.2
  Broker2FuBar, v1.0
  Capping, v3.2.006
  Chatter, v1.0
  Clique, vwowi:revision
  Configator, v5.1.DEV.190
  Constructor, v<%version%> (<%codename%>)
  DataStore, v3.2.003
  DataStoreAchievements, v3.2.003
  DataStoreAuctions, v3.2.003
  DataStoreCharacters, v3.2.003
  DataStoreContainers, v3.2.003
  DataStoreCrafts, v3.2.003
  DataStoreCurrencies, v3.2.003
  DataStoreInventory, v3.2.003
  DataStoreMails, v3.2.003
  DataStorePets, v3.2.003
  DataStoreQuests, v3.2.003
  DataStoreReputations, v3.2.003
  DataStoreSkills, v3.2.003
  DataStoreSpells, v3.2.003
  DataStoreStats, v3.2.003
  DataStoreTalents, v3.2.003
  DebugLib, v5.1.DEV.130
  EnsidiaFails, v
  FuBar, v
  FuBarAddonSpamFu, v1.0.7
  FuBarPerformanceFu, v2.0.0
  Grid, v1.30200.2009081101
  GridStatusAFK, v3.2.0.39
  GridStatusRes, vv3.00.03.03 release
  InspectEquip, v1.6.2
  JewelTips, v0.6.0
  LibBossIDs10, v
  LibExtraTip, v1.1
  LibHealComm40, v
  LibRock10, v
  LibWrapperHealComm10, v
  LittleWigsTBC, v
  LootFilter, v3.13.1
  MobSpells, v
  Multishot, v1.5
  oRA2, v2.0.$Revision: 666 $
  oRA2Optional, v2.0
  oRA2Participant, v2.0
  oRA3, v
  Overachiever, v0.50
  OverachieverTabs, v0.50
  PallyPower, vv3.2.8-release
  QuestHelper, v1.3.2-beta
  RangeDisplay, v3.7.6
  RatingBuster, v
  SlideBar, v5.1.DEV.136
  Stubby, v5.1.DEV.130
  TimeToExecute, v0.2.7
  TipHelper, v<%version%> (<%codename%>)
  Transcriptor, v3.0
  WIM, v3.2.2
  BlizRuntimeLib_deDE v3.2.2.30200 <eu>
  (ck=6de)