Appeared during the Nagrand quest: "The Pale Threat":

Date: 2015-01-17 14:37:14
ID: 1
Error occured in: Global
Count: 1
Message: ..\AddOns\WoWPro\WoWPro_Events.lua line 349:
attempt to index field 'leaderBoard' (a nil value)
Debug:
WoWPro\WoWPro_Events.lua:349: UpdateQuestTracker()
WoWPro\WoWPro_Parser.lua:762: RowUpdate()
WoWPro\WoWPro_Broker.lua:259: rowContentUpdate()
WoWPro\WoWPro_Broker.lua:291:
WoWPro\WoWPro_Broker.lua:214
(tail call): ?

[string "safecall Dispatcher[1]"]:9:
[string "safecall Dispatcher[1]"]:5
(tail call): ?
...nterface\AddOns\Ace3\AceBucket-3.0\AceBucket-3.0.lua:118: func()
Ace3\AceTimer-3.0\AceTimer-3.0.lua:55:
Ace3\AceTimer-3.0\AceTimer-3.0.lua:48
Locals:
None
AddOns:
BlizzBugsSuck, v6.0.3.2
Swatter, v5.21c.5521 (SanctimoniousSwamprat)
Accountant, v6.01.60000
Ace3, v
ACP, v3.4.14
Arh, v1.4.2
AskMrRobot, v19
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, v12.504
BagBrother, v6.0.16
Bagnon, v6.0.16
Bazooka, vv2.4.2
BeanCounter, v5.21c.5521 (SanctimoniousSwamprat)
Breeze, vv1.10
ButtonForge, v0.9.38
Carbonite, v6.0.1
CarboniteInfo, v1.0
CarboniteNotes, v1.1
CarboniteNotesSample, v1.0
CarboniteQuests, v1.0
CarboniteSocial, v1.0
CarboniteWarehouse, v1.0
CarboniteWeekly, v1.0
Configator, v5.1.DEV.376(/embedded)
DebugLib, v5.1.DEV.337(/embedded)
Enchantrix, v5.21c.5521 (SanctimoniousSwamprat)
EnchantrixBarker, v5.21c.5521 (SanctimoniousSwamprat)
GatherMate2, v1.33.4
Grail, v067
HealBot, v6.0.3.9
HealBotTips, v6.0.3.9
Informant, v5.21c.5521 (SanctimoniousSwamprat)
LibExtraTip, v5.12.DEV.363(/embedded)
MasterPlan, v0.24.1
MineOMatic, v6.0.3.007
MogIt, v3.4.0
MyBits, v
NugComboBar, v
omouse, v0.1.4
Pawn, v1.9.12
Postal, v3.5.1
Skada, v1.4-28
Stubby, v5.21c.5521 (SanctimoniousSwamprat)
TheUndermineJournal, v3.3.20150117
TipHelper, v5.12.DEV.351(/embedded)
TomTom, vv60000-1.1.1
WIM, v3.6.23
WoWPro, v6.0.3J
WoWProAchievements, v6.0.3J
WoWProDailies, v6.0.3J
WoWProLeveling, v6.0.3J
WowProProfession, v6.0.3J
WoWProRecorder, v6.0.0
WoWProWorldEvents, v6.0.3J
BlizRuntimeLib_enUS v6.0.3.60000
(ck=b82)

Looks like access to WoWPro.QuestLog[qid].leaderBoard was not testing that WoWPro.QuestLog[qid] existed. Fixed.