This is apparently a duplicate of ticket 5.  I apologize, I should have checked first.  It is notable that this error occurs even without XLoot-Group, or the other XLoot extensions loaded.

What steps will reproduce the problem?
1.Install XLoot
2.Enable it
3.Login

What is the expected output? What do you see instead?
No expected output, but this error occurs when logging in.  

What version of the product are you using?
0.9-30000-1

Do you have an error log of what happened?
Date: 2008-10-21 19:12:12
ID: 3
Error occured in: Global
Count: 1
Message: ..\AddOns\XLoot\XLootOptions.lua line 16:
   attempt to index local 'L' (a nil value)
Debug:
   [C]: ?
   XLoot\XLootOptions.lua:16 in main chunk
AddOns:
  Swatter, v5.1.3662 (SnaggleTooth)
  Ace, v
  Ace2, v
  Ace3, v
  AucAdvanced, v5.1.3662 (SnaggleTooth)
  AucFilterBasic, v5.1.3662 (SnaggleTooth)
  AucFilterOutlier, v5.1.3662.2531
  AucMatchUndercut, v5.1.3662.2531
  AucStatClassic, v5.1.3662 (SnaggleTooth)
  AucStatHistogram, v5.1.3662 (SnaggleTooth)
  AucStatPurchased, v5.1.3662 (SnaggleTooth)
  AucStatSales, v5.1.3662.2842
  AucStatSimple, v5.1.3662 (SnaggleTooth)
  AucStatStdDev, v5.1.3662 (SnaggleTooth)
  AucStatWOWEcon, v5.1.3662.2530
  AucUtilAHWindowControl, v5.1.3662.3311
  AucUtilAppraiser, v5.1.3662.2530
  AucUtilAskPrice, v5.1.3662.3175
  AucUtilAutoMagic, v5.1.3662.3142
  AucUtilCompactUI, v5.1.3662.2530
  AucUtilEasyBuyout, v5.1.3662.3583
  AucUtilItemSuggest, v5.1.3662.3108
  AucUtilPriceLevel, v5.1.3662.2545
  AucUtilScanButton, v5.1.3662.2530
  AucUtilScanFinish, v5.1.3662.2530
  AucUtilScanProgress, v5.1.3662.2530
  AucUtilSearchUI, v5.1.3662.3483
  AucUtilVendMarkup, v5.1.3662.2530
  AutoBar, v3.00.02.05 beta
  Babylonian, v5.1.DEV.130
  BeanCounter, v5.1.3662 (SnaggleTooth)
  BigWigs, v2.0
  BulkMail2, v3.0.0
  Cartographer3, v3.0 v0.10.2
  Cartographer3InstancePOIs, v
  Cartographer3Notes, v
  Cartographer3Waypoints, v
  ChatLink, v
  Configator, v5.1.DEV.130
  CooldownCount, v3.0
  Critters, v1.0.3b
  Cryolysis3, vv3.0-beta5
  CurseProfiler, v
  DebugLib, v5.1.DEV.130
  DewdropLib, v
  EnchantrixBarker, v5.1.3662 (SnaggleTooth)
  EnhTooltip, v5.1.3662 (SnaggleTooth)
  FuBar, v
  FuBarExperienceFu, v1.1 $Revision: 65606 $
  FuBarItemBonusesFu, v2.1
  FuBarMailFu, v2.0
  FuBarMiniPerfsFu, v1.0
  FuBarMoneyFu, v20400-1
  FuBarReloadUI, v2.0.0
  FuBarToFu, v2.0
  Gatherer, v3.1.5
  GFWAdSpace, v2.4
  GFWFeedOMatic, v3.0.3
  GFWLinkerator, v3.0
  Historian, v1.2.6
  LibBabbleZone30, v
  LittleWigs, v
  MobInfo2, v3.61
  Mounted, v1.1.7
  NextStep, v1.1
  Omen, v3.0
  oRA2, v2.0.$Revision: 628 $
  Outfitter, v4.3b10
  Prat30, v3.0 (Beta Version)
  Prat30HighCPUUsageModules, v
  Prat30Libraries, v
  SpamSentry, v20081016
  SpecialEventsEmbed, v
  Stubby, v5.1.3662 (SnaggleTooth)
  XLoot, v0.9
  (ck=832)

Please provide any additional information below.
I'm honestly not certain if this is breaking any functionality, but the error is popping up, so I thought I'd report it.