This is an error I get after downloading most recent version of Give Me Peace and installing it via Curse Client.  I opened the lua file in Visual Studio to see where the error was.  Fortunately, there are only 14 lines of code for this program, unfortunately there are about 10 instances of "this" within line 14 itself.  

Date: 2011-02-02 17:13:09
ID: 1
Error occured in: Global
Count: 1
Message: ..\AddOns\Peace\Peace.lua line 14:
   attempt to index global 'this' (a nil value)
Debug:
   [C]: ?
   Peace\Peace.lua:14 Peace_OnLoad()
   [string "*:OnLoad"]:1:
      [string "*:OnLoad"]:1
AddOns:
  Swatter, v3.2.3 (<%codename%>)
  Ace3, v
  ACP, v3.3.13
  AuctionProfitMaster, v1.4
  Bagnon, v2.14.0
  Carbonite, v4.034
  CrapAway, v
  CTBuffMod, v4.002
  DBMBurningCrusade, v
  DBMCore, v
  Genie, v4.2_gamma
  OmniCC, v4.0.waffles11
  Peace, vr09129
  BlizRuntimeLib_enUS v4.0.3.40000 <us>
  (ck=129)

Here is line 14:

PEACE_SUMMARY = "Give Me Peace has been protecting you since %s and has blocked a total of %s unauthorised whispers across all characters.";PEACE_ADVERT = "I'm protected by the 'Give Me Peace' addon which blocks and hides incoming whispers from unauthorised players. Get your copy from either wowinterface.com or curse.com.";Peace_Options = { true, true, true, false, false, true, 0, 0, 0, true, true, nil, true, true, true };Peace_CustomMsg = { "Auto Reply: I'm currently busy in %s, please try again later or send me an in-game mail.", "Auto Reply: I'm currently busy, please try again later or send me an in-game mail.", false }; Peace_BlockedSND = "Interface\\Addons\\Peace\\blocked.mp3";Peace_FriendList = {};Peace_ManualList = {};Peace_IgnoreList = {};Peace_Temporary = {};Peace_BlockedMsg = {};function Peace_OnLoad() this:RegisterEvent("ADDON_LOADED");this:RegisterEvent("COMBAT_LOG_EVENT_UNFILTERED");this:RegisterEvent("PLAYER_LOGIN");this:RegisterEvent("FRIENDLIST_UPDATE");this:RegisterEvent("GUILD_ROSTER_UPDATE");this:RegisterEvent("CHAT_MSG_WHISPER");this:RegisterEvent("CHAT_MSG_WHISPER_INFORM");SlashCmdList["PEACE"] = Peace_Commandline;SLASH_PEACE1="/peace"; end;function Peace_Commandline(args) local lowerargs = strlower(args);if(lowerargs == "blocked") then Peace_ListWhispers();elseif(lowerargs == "advert") then if(Peace_Options[14]) then Peace_Options[14] = false;DEFAULT_CHAT_FRAME:AddMessage("|cff00e0ffPEACE : |cffffffff Advert [OFF].");else Peace_Options[14] = true;DEFAULT_CHAT_FRAME:AddMessage("|cff00e0ffPEACE : |cffffffff Advert [ON].");end; elseif(lowerargs == "scan") then if(Peace_Options[2]) then Peace_ScanGuild(); end;if(Peace_Options[3]) then Peace_ScanFriends(); end; elseif(lowerargs == "toggle") then if(Peace_Options[1]) then  Peace_Options[1] = false;DEFAULT_CHAT_FRAME:AddMessage("|cff00e0ffPEACE : |cffffffff Turned [OFF].");else  Peace_Options[1] = true;  DEFAULT_CHAT_FRAME:AddMessage("|cff00e0ffPEACE : |cffffffff Turned [ON].");end;else DEFAULT_CHAT_FRAME:AddMessage("|cff00e0ffOther options available in the 'Give Me Peace' addon are as follows:");DEFAULT_CHAT_FRAME:AddMessage("|cff00e0ff/peace blocked : |cffffffff Shows a list of whispers for the current character and session.");DEFAULT_CHAT_FRAME:AddMessage("|cff00e0ff/peace toggle : |cffffffff Toggle On/Off the blocking of whispers by the addon.");DEFAULT_CHAT_FRAME:AddMessage("|cff00e0ff/peace scan : |cffffffff Manually scan your guild and friends list and authorise them.");DEFAULT_CHAT_FRAME:AddMessage("|cff00e0ff/peace advert : |cffffffff The addon also sends a 'Protected by' message to blocked players, this option turns this feature on/off.");local msgOptions = string.format(PEACE_SUMMARY, Peace_Options[12], Peace_Options[7]);OptionsBlockedSummary:SetText(msgOptions);Peace_CustomMsgEditBox:SetText(Peace_CustomMsg[2]);Peace_ProcessOptions();Peace_OptionsFrame:Show();end;end;function Peace_OnUpdate() end;function Peace_Initialise() Peace_Localisation();if(Peace_Options[10]) then  if(Peace_Options[12]) then DEFAULT_CHAT_FRAME:AddMessage("|cff00e0ffGive Me Peace ("..PEACE_VERSION..") loaded! |cffffffffType /peace for options. "..Peace_Options[7].." whispers have been blocked since installing this addon on "..Peace_Options[12]..".");  else DEFAULT_CHAT_FRAME:AddMessage("|cff00e0ffGive Me Peace ("..PEACE_VERSION..") loaded! |cffffffffType /peace for options.");  end;end;end;function Peace_EventHandler(event,...) if(event == "ADDON_LOADED") then if(arg1 == "Peace") then Peace_Initialise();end;end; if(event == "PLAYER_LOGIN") then if(IsInGuild()) then GuildRoster();end;ShowFriends();Peace_CleanBlockedHistory();if(not(Peace_Options[12])) then  local hour, minute = GetGameTime();local weekday, month, day, year = CalendarGetDate();Peace_Options[12] = day.."/"..month.."/"..year.." "..hour..":"..minute;  end;end; if(event == "FRIENDLIST_UPDATE") then if(not(loginFriendsLoad)) then loginFriendsLoad = true;if(Peace_Options[3]) then Peace_ScanFriends(); end;end; elseif(event == "GUILD_ROSTER_UPDATE") then if(not(loginGuildList)) then loginGuildList= true;if(IsInGuild()) then Peace_ScanGuild();end;end;end; end;function Peace_ScanGuild() if(IsInGuild() and Peace_Options[2]) then GuildRoster();local numGuild = 0;local numMembers = GetNumGuildMembers(true) for i=1, numMembers do local memberName = strlower(GetGuildRosterInfo(i));if(memberName and not(Peace_IsAuthorised(memberName))) then  numGuild = numGuild + 1;tinsert(Peace_FriendList, memberName);end;end;if(Peace_Options[11] and numGuild > 0) then DEFAULT_CHAT_FRAME:AddMessage("|cff00e0ffPEACE|cffffffff : Added "..numGuild.." guild members to the safe list."); end;end;end;function Peace_ScanFriends() ShowFriends();local numPeeps = 0;local numFriends = GetNumFriends();for i = 1, numFriends do local friendName = GetFriendInfo(i);if(not(friendName)) then ShowFriends();return;end;friendName = strlower(friendName);if(friendName and not(Peace_IsAuthorised(friendName))) then numPeeps = numPeeps + 1;tinsert(Peace_FriendList, friendName);end;end;for count,value in ipairs(Peace_ManualList) do  if(not(Peace_IsAuthorised(value))) then  tinsert(Peace_FriendList, value);numPeeps = numPeeps + 1;end;  end; if(Peace_Options[11] and numPeeps > 0) then DEFAULT_CHAT_FRAME:AddMessage("|cff00e0ffPEACE|cffffffff : Added "..numPeeps.." friends to the safe list."); end;end;function Peace_IsAuthorised(name) for count,value in ipairs(Peace_FriendList) do  if(value == name) then  return(true);end;  end;for count,value in ipairs(Peace_Temporary) do  if(value == name) then  return(true);end;  end;return(false);end;function Peace_IsIgnored(name) for count,value in ipairs(Peace_IgnoreList) do  if(value == name) then  return(true);end;  end;return(false);end;function Peace_CheckInGroup(name) if(UnitPlayerOrPetInRaid(name) or UnitInParty("name")) then return(true); end;return(false); end;ChatFrame_AddMessageEventFilter("CHAT_MSG_WHISPER", function(...) if(not(Peace_Options[1])) then return; end;local hour, minute = GetGameTime();local weekday, month, day, year = CalendarGetDate();local msgTime = hour..":"..minute;local msgDate = day.."/"..month.."/"..year;local incomingPlayer = strlower(select(4, ...));local whisperFlag = select(8, ...);if(whisperFlag == "GM") then return; end;if(Peace_CheckInGroup(incomingPlayer) and not(Peace_IsIgnored(incomingPlayer))) then return; end;if(Peace_IsAuthorised(incomingPlayer) and not(Peace_IsIgnored(incomingPlayer))) then return; end; local msgBlocked = string.format(MSG_BLOCKED1, UnitName("player"), UnitName("player"), UnitName("player"));if(Peace_Options[6]) then  if(Peace_CustomMsg[3]) then  SendChatMessage(Peace_CustomMsg[2], "WHISPER", nil, incomingPlayer);else SendChatMessage(msgBlocked, "WHISPER", nil, incomingPlayer); end;if(Peace_Options[14]) then SendChatMessage(PEACE_ADVERT, "WHISPER", nil, incomingPlayer);end;end;if(Peace_Options[4]) then DEFAULT_CHAT_FRAME:AddMessage("|cff00e0ffPEACE : |cffffffff"..incomingPlayer.." sent a whisper which was blocked. Type /peace blocked to view any blocked whispers."); end;tinsert(Peace_BlockedMsg, {incomingPlayer, arg1, msgDate, msgTime, UnitName("player")});if(not(lastPlayerMsg == arg1)) then lastPlayerMsg = arg1;Peace_Options[7] = tonumber(Peace_Options[7]) + 1 if(Peace_Options[5]) then PlaySoundFile(Peace_BlockedSND); end;end;return(true);end);ChatFrame_AddMessageEventFilter("CHAT_MSG_WHISPER_INFORM", function(_,_,msg,player) if(not(Peace_Options[1])) then return; end;local lowerPlayer = strlower(player);local msgBlocked = string.format(MSG_BLOCKED1, UnitName("player"), UnitName("player"),UnitName("player"));if(msg == msgBlocked or msg == Peace_CustomMsg[2] or msg == PEACE_ADVERT) then return(true); end;if(Peace_Options[13]) then if(not(Peace_IsAuthorised(lowerPlayer)) and not(Peace_CheckInGroup(lowerPlayer))) then tinsert(Peace_Temporary, lowerPlayer);DEFAULT_CHAT_FRAME:AddMessage("|cff00e0ffPEACE|cffffffff : Initiated first whisper to "..player..", adding to your temporary authorised list for any replies.");end;end;return;end);function Peace_ListWhispers() for count,value in ipairs(Peace_BlockedMsg) do  if(value[1] and value[2]) then  if(value[5]) then DEFAULT_CHAT_FRAME:AddMessage("|cff00e0ff["..value[3].." "..value[4].." -> "..value[5].."] "..value[1].." said|cffffffff : "..value[2]);else DEFAULT_CHAT_FRAME:AddMessage("|cff00e0ff["..value[3].." "..value[4].."] "..value[1].." said|cffffffff : "..value[2]); end;end;  end;end;function Peace_CleanBlockedHistory() if(Peace_Options[15]) then for i in pairs(Peace_BlockedMsg) do  Peace_BlockedMsg[i] = nil;end;end;end;function PeaceCloseCreditsFrame_OnClick() Peace_ShowCreditsFrame:Hide();Peace_OptionsFrame:Show();end;function Peace_CloseOptionsFrame_OnClick() local customText = Peace_CustomMsgEditBox:GetText();Peace_CustomMsg[2] = customText;Peace_OptionsFrame:Hide();end;function Peace_CreditsButton_OnClick() Peace_OptionsFrame:Hide(); Peace_ShowCreditsFrame:Show();end;function Peace_ScanGuildFriendsButton_OnClick() if(Peace_Options[2]) then Peace_ScanGuild(); end;if(Peace_Options[3]) then Peace_ScanFriends(); end; end;function Peace_ManualClearHistoryButton_OnClick() for i in pairs(Peace_BlockedMsg) do  Peace_BlockedMsg[i] = nil;end;DEFAULT_CHAT_FRAME:AddMessage("|cff00e0ffPEACE|cffffffff : Deleted any saved blocked whispers. ");end;function Peace_ProcessOptions() if(Peace_Options[1]) then Peace_EnableAddonCheck:SetChecked(true); end;if(Peace_Options[2]) then Peace_AutoAddGuildCheck:SetChecked(true); end;if(Peace_Options[3]) then Peace_AutoAddFriendsCheck:SetChecked(true); end;if(Peace_Options[6]) then Peace_NotifyBlockedPlayersCheck:SetChecked(true); end;if(Peace_Options[4]) then Peace_InformWhenPlayerBlockedCheck:SetChecked(true); end;if(Peace_Options[5]) then Peace_DoSoundOnBlockCheck:SetChecked(true); end;if(Peace_Options[13]) then Peace_AutoAddWhisperedPlayersCheck:SetChecked(true); end;if(Peace_Options[15]) then Peace_ResetBlockedWhisperHistoryCheck:SetChecked(true); end;if(Peace_CustomMsg[3]) then Peace_UseCustomMessageTextCheck:SetChecked(true); end;end;function Peace_EnableAddonCheck_OnClick() local CheckboxEnabled = Peace_EnableAddonCheck:GetChecked();if(CheckboxEnabled == 1) then Peace_Options[1] = true;  else Peace_Options[1] = false; end; end;function Peace_AutoAddGuildCheck_OnClick() local CheckboxEnabled = Peace_AutoAddGuildCheck:GetChecked();if(CheckboxEnabled == 1) then  Peace_Options[2] = true;  Peace_ScanGuild();else Peace_Options[2] = false; end; end;function Peace_AutoAddFriendsCheck_OnClick() local CheckboxEnabled = Peace_AutoAddFriendsCheck:GetChecked();if(CheckboxEnabled == 1) then  Peace_Options[3] = true;  Peace_ScanFriends();else Peace_Options[3] = false; end; end;function Peace_AutoAddWhisperedPlayersCheck_OnClick() local CheckboxEnabled = Peace_AutoAddWhisperedPlayersCheck:GetChecked();if(CheckboxEnabled == 1) then Peace_Options[13] = true;  else Peace_Options[13] = false; end; end;function Peace_NotifyBlockedPlayersCheck_OnClick() local CheckboxEnabled = Peace_NotifyBlockedPlayersCheck:GetChecked();if(CheckboxEnabled == 1) then Peace_Options[6] = true;  else Peace_Options[6] = false; end; end;function Peace_InformWhenPlayerBlockedCheck_OnClick() local CheckboxEnabled = Peace_InformWhenPlayerBlockedCheck:GetChecked();if(CheckboxEnabled == 1) then Peace_Options[4] = true;  else Peace_Options[4] = false; end; end;function Peace_UseCustomMessageTextCheck_OnClick() local CheckboxEnabled = Peace_UseCustomMessageTextCheck:GetChecked();if(CheckboxEnabled == 1) then Peace_CustomMsg[3] = true;  else Peace_CustomMsg[3] = false; end; end;function Peace_ResetBlockedWhisperHistoryCheck_OnClick() local CheckboxEnabled = Peace_ResetBlockedWhisperHistoryCheck:GetChecked();if(CheckboxEnabled == 1) then Peace_Options[15] = true;  else Peace_Options[15] = false; end; end;function Peace_DoSoundOnBlockCheck_OnClick() local CheckboxEnabled = Peace_DoSoundOnBlockCheck:GetChecked();if(CheckboxEnabled == 1) then Peace_Options[5] = true;  else Peace_Options[5] = false; end; end;function AddNewAuthorisedButton_OnClick() local playerName = strlower(EnteredPlayerNameBox:GetText());if(playerName and not(Peace_IsAuthorised(playerName))) then tinsert(Peace_ManualList, playerName);for count,value in ipairs(Peace_ManualList) do  if(not(Peace_IsAuthorised(value))) then  tinsert(Peace_FriendList, value);end;  end;DEFAULT_CHAT_FRAME:AddMessage("|cff00e0ffPEACE|cffffffff : Added "..playerName.." to the authorised list.");else DEFAULT_CHAT_FRAME:AddMessage("|cff00e0ffPEACE|cffffffff : "..playerName.." already exists in your authorised list.");end;end;function DoesPlayerExistManual(player) if(player) then for count,value in ipairs(Peace_ManualList) do  if(value == player) then return(true); end;  end; end;end;function DeleteAuthoriseButton_OnClick() local playerName = strlower(EnteredPlayerNameBox:GetText());if(playerName and Peace_IsAuthorised(playerName)) then for count,value in ipairs(Peace_FriendList) do  if(value == playerName) then  tremove(Peace_FriendList, count);DEFAULT_CHAT_FRAME:AddMessage("|cff00e0ffPEACE|cffffffff : Removed "..playerName.." from the authorised list.");end;  end; else DEFAULT_CHAT_FRAME:AddMessage("|cff00e0ffPEACE|cffffffff : "..playerName.." doesnt exist in the automatic authorised list.");end;if(playerName and DoesPlayerExistManual(playerName)) then for count,value in ipairs(Peace_ManualList) do  if(value == playerName) then  tremove(Peace_ManualList, count);end;  end; end;if(playerName and Peace_IsIgnored(playerName)) then for count,value in ipairs(Peace_IgnoreList) do  if(value == playerName) then  tremove(Peace_IgnoreList, count);DEFAULT_CHAT_FRAME:AddMessage("|cff00e0ffPEACE|cffffffff : Removed "..playerName.." from the ignore list.");end;  end; end;if(Peace_Options[2]) then Peace_ScanGuild(); end;if(Peace_Options[3]) then Peace_ScanFriends(); end; end;function IgnorePlayerWhisperButton_OnClick() local playerName = strlower(EnteredPlayerNameBox:GetText());if(playerName and not(Peace_IsIgnored(playerName))) then tinsert(Peace_IgnoreList, playerName);DEFAULT_CHAT_FRAME:AddMessage("|cff00e0ffPEACE|cffffffff : Added "..playerName.." to the ignore list.");else DEFAULT_CHAT_FRAME:AddMessage("|cff00e0ffPEACE|cffffffff : "..playerName.." is already ignored.");end;end;function Peace_CleanWholePlayerList_OnClick() local refreshCount = 0;for i in pairs(Peace_FriendList) do  Peace_FriendList[i] = nil;refreshCount = refreshCount + 1;end;DEFAULT_CHAT_FRAME:AddMessage("|cff00e0ffPEACE|cffffffff : Removed "..refreshCount.." players from the authorised list. No ignored entries have been deleted and those will need to be removed manually.");if(Peace_Options[2]) then Peace_ScanGuild(); end;if(Peace_Options[3]) then Peace_ScanFriends();end;end;

A lot of code for one line, a bit ridiculous, which is why I a, having a hard time finding out whether the global error occurs for all of 'this' functions, or if there is a mistyped ";" somewhere......

This is as detailed as I can get, please get back to me.

Waldo