WowAce

What steps will reproduce the problem?
1. Trying to add or delete spell IDs from the Custom Shields box in the shields statuses
2.
3.

What is the expected output? What do you see instead?
I enter what I want changed and press okay, then everything reverts back to the previous entries.

What Grid2 version and language of WoW are you using?
r734 - English

Do you have an error log of what happened?
Date: 2014-11-22 17:25:43
ID: 1
Error occured in: Global
Count: 1
Message: ...dOns\Grid2Options\modules\statuses\StatusShields.lua line 118:
   invalid value (nil) at index 7 in table for 'concat'
Debug:
   (tail call): ?
   [C]: concat()
   ...dOns\Grid2Options\modules\statuses\StatusShields.lua:118:
      ...dOns\Grid2Options\modules\statuses\StatusShields.lua:112
   (tail call): ?
   [C]: ?
   [string "safecall Dispatcher[2]"]:9:
      [string "safecall Dispatcher[2]"]:5
   (tail call): ?
   ...nfig-3.0\AceConfigDialog-3.0\AceConfigDialog-3.0.lua:799:
      ...nfig-3.0\AceConfigDialog-3.0\AceConfigDialog-3.0.lua:614
   (tail call): ?
   [C]: ?
   [string "safecall Dispatcher[3]"]:9:
      [string "safecall Dispatcher[3]"]:5
   (tail call): ?
   Ace3\AceGUI-3.0\AceGUI-3.0.lua:314: Fire()
   ...Ons\Ace3\AceGUI-3.0\widgets\AceGUIWidget-EditBox.lua:74:
      ...Ons\Ace3\AceGUI-3.0\widgets\AceGUIWidget-EditBox.lua:71
   ...Ons\Ace3\AceGUI-3.0\widgets\AceGUIWidget-EditBox.lua:120:
      ...Ons\Ace3\AceGUI-3.0\widgets\AceGUIWidget-EditBox.lua:117
Locals:
None
AddOns:
  BlizzBugsSuck, v6.0.2.1
  InspectFix, v4.5.0
  Swatter, v5.21c.5521 (SanctimoniousSwamprat)
  NPCScan, v6.0.3.4
  NPCScanAutoAdd, v2.3
  NPCScanOverlay, v6.0.3.2
  Ace3, v
  AceGUI30SharedMediaWidgets, v
  AddonLoader, v2.0.1
  AdiBags, vv1.7.12
  AdiBagsOutfitter, vv1.4
  Atlas, v1.31.00
  AtlasArena, v1.5.05
  AtlasBattlegrounds, v1.31.00
  AtlasBurningCrusade, v1.31.00
  AtlasCataclysm, v1.31.00
  AtlasClassicWoW, v1.31.00
  AtlasDungeonLocs, v1.31.00
  AtlasMistsofPandaria, v1.31.00
  AtlasOutdoorRaids, v1.31.00
  AtlasScenarios, v1.31.00
  AtlasTransportation, v1.31.00
  AtlasWorldEvents, v3.10
  AtlasWrathoftheLichKing, v1.31.00
  AtlasLoot, vv7.07.03
  AtlasLootCataclysm, vv7.07.03
  AtlasLootClassicWoW, vv7.07.03
  AtlasLootLoader, vv7.07.03
  AtlasLootMistsofPandaria, vv7.07.03
  AucAdvanced, v5.21c.5521 (SanctimoniousSwamprat)
  AucFilterBasic, v5.21c.5521 (SanctimoniousSwamprat)
  AucFilterOutlier, v5.21c.5521.5459(5.21c/embedded)
  AucMatchUndercut, v5.21c.5521.5507(5.21c/embedded)
  AucScanData, v5.21c.5521 (SanctimoniousSwamprat)
  AucStatHistogram, v5.21c.5521 (SanctimoniousSwamprat)
  AucStatiLevel, v5.21c.5521 (SanctimoniousSwamprat)
  AucStatPurchased, v5.21c.5521 (SanctimoniousSwamprat)
  AucStatSales, v5.21c.5521.5476(5.21c/embedded)
  AucStatSimple, v5.21c.5521 (SanctimoniousSwamprat)
  AucStatStdDev, v5.21c.5521 (SanctimoniousSwamprat)
  AucStatWOWEcon, v5.21c.5521.5323(5.21c/embedded)
  AucUtilAHWindowControl, v5.21c.5521.5347(5.21c/embedded)
  AucUtilAppraiser, v5.21c.5521.5495(5.21c/embedded)
  AucUtilAskPrice, v5.21c.5521.5447(5.21c/embedded)
  AucUtilAutoMagic, v5.21c.5521.5443(5.21c/embedded)
  AucUtilCompactUI, v5.21c.5521.5496(5.21c/embedded)
  AucUtilEasyBuyout, v5.21c.5521.5507(5.21c/embedded)
  AucUtilFixAH, v5.21c.5521 (SanctimoniousSwamprat)
  AucUtilItemSuggest, v5.21c.5521.5417(5.21c/embedded)
  AucUtilPriceLevel, v5.21c.5521.5458(5.21c/embedded)
  AucUtilScanButton, v5.21c.5521.5403(5.21c/embedded)
  AucUtilScanFinish, v5.21c.5521.5515(5.21c/embedded)
  AucUtilScanProgress, v5.21c.5521.4979(5.21c/embedded)
  AucUtilScanStart, v5.21c.5521.5347(5.21c/embedded)
  AucUtilSearchUI, v5.21c.5521.5515(5.21c/embedded)
  AucUtilSimpleAuction, v5.21c.5521.5514(5.21c/embedded)
  AucUtilVendMarkup, v5.21c.5521.4828(5.21c/embedded)
  Babylonian, v5.1.DEV.332(/embedded)
  BadBoy, v12.428
  BadBoyCCleaner, v
  BadBoyGuilded, v
  Bartender4, v4.6.5
  BetterBlizzOptions, v
  BigWigs, v4.550
  BigWigsAutoReply, v1.2
  BrokerProfessionsMenu, v
  CalendarKeyboardFixer, v1.2.0
  CallbackHandler10, v
  CantHealYou, v3.32
  Chinchilla, vv2.7.2
  CinematicSoundEnabler, v1.0.1
  Clique, vv60000-1.0.0
  CombustionHelper, v3.5.5
  Configator, v5.1.DEV.376(/embedded)
  DeathNote, vv1.8c
  DebugLib, v5.1.DEV.337(/embedded)
  FollowerLocationInfo, v0.6-beta1
  ForteCasting, v
  ForteClass, v
  ForteCooldown, v
  ForteCore, v1.980.20
  ForteTalent, v
  ForteTimer, v
  Gnosis, vv4.32
  Grid2, vr734
  Grid2AoeHeals, vr734
  Grid2LDB, vr734
  Grid2Options, vr734
  Grid2RaidDebuffs, vr734
  Grid2RaidDebuffsOptions, vr734
  GTFO, v4.35.3
  HaloPro, v(v3.6.3.0)
  HolyNovaSonar, v1.2
  IceHUD, v1.9.6
  IgnoreMore, v1.1.1-40300
  kgPanels, v1.20
  LibAboutPanel, v1.6.2
  LibAlts10, v2.0
  LibBabbleClass30, v
  LibChatAnims, v
  LibDBIcon10, v
  LibExtraTip, v5.12.DEV.363(/embedded)
  LibMapData10, v1.0.r146
  LibSharedMedia30, v3.0-89
  LibSink20, v
  LibStub, v
  LoggerHead, v173
  Malkorok, v
  MarkingBar, v2.2.1
  Masque, v6.0.0
  MasqueCaith, v6.0.0
  miirGui, v3.0.2
  miirguiicons, v3
  MinimapButtonFrame, v3.1.10d
  MinimapButtonFramesDark, v2.0.5
  MinimapButtonFrameSkinPack, v3.0.1b
  MogIt, vv3.3.4
  MoveAnything, v15.0.5
  OmniCC, v6.0.4
  Outfitter, v5.10b6
  Overachiever, v0.80
  OverachieverTabs, v0.80
  Pawn, v1.9.7
  Prat30, v3.5.10
  Prat30HighCPUUsageModules, v
  Prat30Libraries, v
  QuickTalents, v
  RaidAchievement, v1.129
  RaidAchievementOldModules, v
  RSA, v3.000
  RSAPriest, v
  SatchelQueue, v0.1
  ShadowedUnitFrames, vv4.0.7
  Shapes, v1.0.5
  SharedMedia, v3.0.5-186
  SharedMediaAdditionalFonts, v1.0.17
  Skada, v1.4-22
  SkadaWindowButtons, v1.0
  SmartRes2, vRelease 2.7.7
  StrataFix, v3.5.0
  Stubby, v5.21c.5521 (SanctimoniousSwamprat)
  TidyPlates, v6.15.3
  TidyPlatesThreatPlates, v7.011-Alpha
  TidyPlatesHub, v
  TidyPlatesWidgets, v
  TipHelper, v5.12.DEV.351(/embedded)
  TipTac, v14.10.16
  TipTacItemRef, v14.10.16
  TipTacTalents, v14.10.15
  Titan, v5.4.1.60000
  TitanGold, v5.4.1.60000
  TitanPerformance, v5.4.1.60000
  TitanRepair, v5.4.1.60000
  TradeSkillMaster, vv2.9.19
  TradeSkillMasterAdditions, vv2.1.3
  TradeSkillMasterAuctionDB, vv2.6
  TradeSkillMasterCrafting, vv2.6.11
  TradeSkillMasterItemTracker, vv2.1.1
  WeakAuras, v2.0.9.7-2-g962efd2
  WoWDBProfiler, v
  XLoot, vz20a-release
  XLootFrame, vz20a-release
  XLootGroup, vz20a-release
  XLootMaster, vz20a-release
  XLootMonitor, vz20a-release
  XqoLoot, v1.0
  BlizRuntimeLib_enUS v6.0.3.60000 <none>
  (ck=1388)

Please provide any additional information below.
I also disabled all my addons except Grid2 and still the problem persists.