WowAce

What is the expected output? What do you see instead?
No errors?

What version of the product are you using?
1.7.5 r117
and
1.7.4

Do you have an error log of what happened?
Date: 2010-05-12 23:24:52
ID: 1
Error occured in: Global
Count: 2
Message: ..\AddOns\HeadCount\HeadCountFrames.lua line 327:
   attempt to index field '?' (a nil value)
Debug:
   (tail call): ?
   Ace2\AceEvent-2.0\AceEvent-2.0.lua:299: TriggerEvent()
   Ace2\AceEvent-2.0\AceEvent-2.0.lua:910:
      Ace2\AceEvent-2.0\AceEvent-2.0.lua:903
AddOns:
  Swatter, v5.8.4723 (CreepyKangaroo)
  NPCScan, v3.3.0.4
  Ace2, v
  Ace3, v
  ACP, vr41
  AtlasLoot, vv5.10.01
  AtlasLootBurningCrusade, vv5.10.01
  AtlasLootCrafting, vv5.10.01
  AtlasLootOriginalWoW, vv5.10.01
  AtlasLootWorldEvents, vv5.10.01
  AtlasLootWrathoftheLichKing, vv5.10.01
  AtlasLootFu, vv5.10.01
  Auctionator, v2.6.3
  Babylonian, v5.1.DEV.130
  Bagnon, v2.13.2b
  BagnonForever, v1.1.2
  BagnonTooltips, v
  Bartender4, v4.4.2
  BuffEnough, v
  Chatter, v1.0
  Configator, v5.1.DEV.190
  Cromulent, vv1.5.1
  DBMCore, v
  Decursive, v2.5.0_beta_2
  FuBar, v
  FuBarBagFu, vv1.1.7
  FuBarDurabilityFu, v2.14
  FuBarFactionsFu, v2.2.1-80
  FuBarMoneyFu, vv1.2.3
  FuBarPortalFu, v1.16
  FubarReadyFu, v1.3
  FuBarRecountFu, v3.11
  FuBarRestFu, vv1.3.3
  FuBarThreatFu, v3.6.1
  FubarWintergrasperFu, v1.12.2
  Gatherer, v3.1.14
  GatherMate, vv1.23
  GroupCalendar5, v5.2.3
  HeadCount, v1.7.5
  IceHUD, v1.6.2 (Revision: 509)
  Informant, v5.8.4723 (CreepyKangaroo)
  LibRock10, v
  LootWhatIWant, v
  MageFever, v2.5
  MageNuggets, v1.83
  Mapster, v1.3.8
  Omen, v3.0.9
  OmniCC, v2.5.9
  Postal, v3.3.1
  PreformAVEnabler, v2.5
  Quartz, v3.0.3
  RaidRoll, v
  RaidRollLootTracker, v
  RaidTracker, v2.2.62
  RatingBuster, v
  Recount, v
  SaySapped, v2009-12-25
  Scorchio2, v
  SexyMap, v
  SlideBar, v5.8.4723 (CreepyKangaroo)
  SnowfallKeyPress, v
  SpartanUI, v2.6.1.30300
  SpartanUIFilmEffects, v2.6.0.30300
  SpartanUISpinCam, v2.6.0.30300
  Stubby, v5.8.4723 (CreepyKangaroo)
  tabDB, v
  WIM, v3.3.4
  XPerl, v3.0.8
  XPerlArcaneBar, v
  XPerlParty, v
  XPerlPartyPet, v
  XPerlPlayer, v
  XPerlPlayerBuffs, v
  XPerlPlayerPet, v
  XPerlRaidAdmin, v
  XPerlRaidFrames, v
  XPerlRaidHelper, v
  XPerlRaidMonitor, v
  XPerlRaidPets, v
  XPerlTarget, v
  XPerlTargetTarget, v
  BlizRuntimeLib_enUS v3.3.3.30300 <us>
  (ck=738)