WowAce

What steps will reproduce the problem?
1.  I was looking at other players while I had ElitistGroup opened to see how it works and these two errors came up at somewhat random times.

What is the expected output? What do you see instead?
Nothing, but my Swatter showed me 2 error reports which seem to be related to ElitistGroup.

What version of the product are you using?
1.7.7 from curse.

Do you have an error log of what happened?
{
    ["message"] = "Interface\\AddOns\\ElitistGroup\\ElitistGroup.lua:358: invalid option in `format'",
    ["count"] = 10,
    ["addons"] = "  Swatter, v3.1.14 (<%codename%>)\n  WowheadLooter, v30318\n  Corpse, v3.3.5.2\n  Cursor, v3.3.0.2\n  NPCScan, v3.3.5.5\n  NPCScanOverlay, v3.3.5.1\n  AckisRecipeList, vv2.0\n  ACP, v3.3.4 \n  Altoholic, v3.3.002b\n  Atlas, v1.17.0\n  AtlasBattlegrounds, v1.17.0\n  AtlasDungeonLocs, v1.17.0\n  AtlasOutdoorRaids, v1.17.0\n  AtlasTransportation, v1.17.0\n  AtlasLoot, vv5.11.04\n  AtlasLootFu, vv5.11.04\n  Babylonian, v5.1.DEV.130\n  BossTactics, v2.19\n  Capping, v3.3.004\n  Configator, v5.1.DEV.190\n  CTCore, v3.313 (CTMod 3.3)\n  CTMapMod, v3.303 (CTMod 3.3)\n  DataStore, v3.3.001\n  DataStoreAchievements, v3.3.001\n  DataStoreAuctions, v3.3.001\n  DataStoreCharacters, v3.3.001\n  DataStoreContainers, v3.3.001\n  DataStoreCrafts, v3.3.002\n  DataStoreCurrencies, v3.3.001\n  DataStoreInventory, v3.3.002\n  DataStoreMails, v3.3.001\n  DataStorePets, v3.3.001\n  DataStoreQuests, v3.3.001\n  DataStoreReputations, v3.3.001\n  DataStoreSkills, v3.3.002\n  DataStoreSpells, v3.3.001\n  DataStoreStats, v3.3.001\n  DataStoreTalents, v3.3.001\n  DBMBurningCrusade, v\n  DBMCore, v\n  DBMVictorySound, v1.7\n  Decursive, v2.5.1\n  DoTimer, v4.4.1\n  DoTimerOptions, v\n  DrDamage, v1.7.8_release\n  ElitistGroup, v\n  EnsidiaFails, v\n  Gatherer, v3.1.14\n  Gladius, vv1.1.2\n  Omen, v3.0.9\n  oRA3, v\n  Outfitter, v4.10\n  Peggle, v1.02c\n  PlagueBeacon, vBeta 2\n  RaidBuffStatus, v3.263\n  Recount, v\n  SlideBar, v3.1.14 (<%codename%>)\n  SpamSentry, v20091214\n  Vamp, v1.0\n  VampArrow, v2.0\n  BlizRuntimeLib_deDE v3.3.5.30300 <eu>\n  (ck=5cc)\n",
    ["timestamp"] = "2010-08-17 19:59:14",
    ["context"] = "Global",
    ["stack"] = "(tail call): ?\n(tail call): ?\n[C]: in function `format'\nInterface\\AddOns\\ElitistGroup\\ElitistGroup.lua:358: in function `SetTalentText'\nInterface\\AddOns\\ElitistGroup\\modules\\users.lua:107: in function `BuildUI'\nInterface\\AddOns\\ElitistGroup\\modules\\users.lua:23: in function <Interface\\AddOns\\ElitistGroup\\modules\\users.lua:15>\n[string \"safecall Dispatcher[3]\"]:4: in function <[string \"safecall Dispatcher[3]\"]:4>\n[C]: ?\n[string \"safecall Dispatcher[3]\"]:13: in function `?'\n...ist\\libs\\CallbackHandler-1.0\\CallbackHandler-1.0.lua:91: in function `SendMessage'\nInterface\\AddOns\\ElitistGroup\\modules\\scan.lua:207: in function `?'\n...ist\\libs\\CallbackHandler-1.0\\CallbackHandler-1.0.lua:146: in function <...ist\\libs\\CallbackHandler-1.0\\CallbackHandler-1.0.lua:146>\n[string \"safecall Dispatcher[1]\"]:4: in function <[string \"safecall Dispatcher[1]\"]:4>\n[C]: ?\n[string \"safecall Dispatcher[1]\"]:13: in function `?'\n...ist\\libs\\CallbackHandler-1.0\\CallbackHandler-1.0.lua:91: in function `Fire'\n...s\\AckisRecipeList\\libs\\AceEvent-3.0\\AceEvent-3.0.lua:120: in function <...s\\AckisRecipeList\\libs\\AceEvent-3.0\\AceEvent-3.0.lua:119>\n",
},
{
    ["message"] = "...ns\\Blizzard_AchievementUI\\Blizzard_AchievementUI.lua:568: Usage: GetCategoryNumAchievements(categoryID)",
    ["count"] = 2,
    ["addons"] = "  Swatter, v3.1.14 (<%codename%>)\n  WowheadLooter, v30318\n  Corpse, v3.3.5.2\n  Cursor, v3.3.0.2\n  NPCScan, v3.3.5.5\n  NPCScanOverlay, v3.3.5.1\n  AckisRecipeList, vv2.0\n  ACP, v3.3.4 \n  Altoholic, v3.3.002b\n  Atlas, v1.17.0\n  AtlasBattlegrounds, v1.17.0\n  AtlasDungeonLocs, v1.17.0\n  AtlasOutdoorRaids, v1.17.0\n  AtlasTransportation, v1.17.0\n  AtlasLoot, vv5.11.04\n  AtlasLootFu, vv5.11.04\n  Babylonian, v5.1.DEV.130\n  BossTactics, v2.19\n  Capping, v3.3.004\n  Configator, v5.1.DEV.190\n  CTCore, v3.313 (CTMod 3.3)\n  CTMapMod, v3.303 (CTMod 3.3)\n  DataStore, v3.3.001\n  DataStoreAchievements, v3.3.001\n  DataStoreAuctions, v3.3.001\n  DataStoreCharacters, v3.3.001\n  DataStoreContainers, v3.3.001\n  DataStoreCrafts, v3.3.002\n  DataStoreCurrencies, v3.3.001\n  DataStoreInventory, v3.3.002\n  DataStoreMails, v3.3.001\n  DataStorePets, v3.3.001\n  DataStoreQuests, v3.3.001\n  DataStoreReputations, v3.3.001\n  DataStoreSkills, v3.3.002\n  DataStoreSpells, v3.3.001\n  DataStoreStats, v3.3.001\n  DataStoreTalents, v3.3.001\n  DBMBurningCrusade, v\n  DBMCore, v\n  DBMVictorySound, v1.7\n  Decursive, v2.5.1\n  DoTimer, v4.4.1\n  DoTimerOptions, v\n  DrDamage, v1.7.8_release\n  ElitistGroup, v\n  EnsidiaFails, v\n  Gatherer, v3.1.14\n  Gladius, vv1.1.2\n  Omen, v3.0.9\n  oRA3, v\n  Outfitter, v4.10\n  Peggle, v1.02c\n  PlagueBeacon, vBeta 2\n  RaidBuffStatus, v3.263\n  Recount, v\n  SlideBar, v3.1.14 (<%codename%>)\n  SpamSentry, v20091214\n  Vamp, v1.0\n  VampArrow, v2.0\n  BlizRuntimeLib_deDE v3.3.5.30300 <eu>\n  (ck=5cc)\n",
    ["timestamp"] = "2010-08-17 20:20:36",
    ["context"] = "Global",
    ["stack"] = "(tail call): ?\n[C]: ?\n[C]: in function `GetCategoryNumAchievements'\n...ns\\Blizzard_AchievementUI\\Blizzard_AchievementUI.lua:568: in function `AchievementFrameComparison_UpdateStatusBars'\n...ns\\Blizzard_AchievementUI\\Blizzard_AchievementUI.lua:2383: in function <...ns\\Blizzard_AchievementUI\\Blizzard_AchievementUI.lua:2380>\n",
},

Please provide any additional information below.
I just thought I should let you know.