error in nUI_ButtonBar:SaveBindings

[Belechannas]

Got this on a toon I haven't played much, if at all, since installing nUI. It popped up when I logged in:

Date: 2010-05-22 00:47:05
ID: 1
Error occured in: Global
Count: 1
Message: ..\AddOns\nUI\Bars\nUI_ButtonBar.lua line 284:
Usage: SaveBindings(1||2)
Debug:
[C]: ?
[C]: SaveBindings()
nUI\Bars\nUI_ButtonBar.lua:284:
nUI\Bars\nUI_ButtonBar.lua:167
AddOns:
Swatter, v5.8.4723 (CreepyKangaroo)
AucAdvanced, v5.8.4723 (CreepyKangaroo)
AucFilterBasic, v5.8.4723 (CreepyKangaroo)
AucFilterOutlier, v5.8.4723.2531
AucMatchUndercut, v5.8.4723.2531
AucStatHistogram, v5.8.4723 (CreepyKangaroo)
AucStatiLevel, v5.8.4723 (CreepyKangaroo)
AucStatPurchased, v5.8.4723 (CreepyKangaroo)
AucStatSales, v5.8.4723.2842
AucStatSimple, v5.8.4723 (CreepyKangaroo)
AucStatStdDev, v5.8.4723 (CreepyKangaroo)
AucStatWOWEcon, v5.8.4723.2530
AucUtilAHWindowControl, v5.8.4723.3311
AucUtilAppraiser, v5.8.4723.2530
AucUtilAskPrice, v5.8.4723.3175
AucUtilAutoMagic, v5.8.4723.3142
AucUtilCompactUI, v5.8.4723.2530
AucUtilEasyBuyout, v5.8.4723.3583
AucUtilFixAH, v5.8.4723 (CreepyKangaroo)
AucUtilGlypher, v5.8.4723.2545
AucUtilItemSuggest, v5.8.4723.3108
AucUtilPriceLevel, v5.8.4723.2545
AucUtilScanButton, v5.8.4723.2530
AucUtilScanFinish, v5.8.4723.3576
AucUtilScanProgress, v5.8.4723.2530
AucUtilScanStart, v5.8.4723.2530
AucUtilSearchUI, v5.8.4723.3655
AucUtilSimpleAuction, v5.8.4723.4546
AucUtilVendMarkup, v5.8.4723.2530
AutoDecline, v1.5.30000
BeanCounter, v5.8.4723 (CreepyKangaroo)
BonusScanner, v5.3
Enchantrix, v5.8.4723 (CreepyKangaroo)
EnchantrixBarker, v5.8.4723 (CreepyKangaroo)
GearScore, v3.1.15 - Release
Informant, v5.8.4723 (CreepyKangaroo)
nUI, v5.06.17 (Plus)
nUIHealthRace, v1.01.01
nUIInfoPanelDualStats, v1.03.01
nUITransparentConsole, v1.00.00
Skada, v1.2-27
SkadaDamage, v1.0
SkadaEnemies, v1.0
SkadaFailbot, v1.0
SkadaThreat, v1.0
SlideBar, v5.8.4723 (CreepyKangaroo)
Stubby, v5.8.4723 (CreepyKangaroo)
BlizRuntimeLib_enUS v3.3.3.30300 <us>
(ck=694)