Set Focus

[Slaytanic]

I receive this error when attempting to set focus:

Date: 2011-06-23 01:18:36
ID: 1
Error occured in: AddOn: nUI
Count: 1
Message: Error: AddOn nUI attempted to call a forbidden function (FocusUnit()) from a tainted execution path.
Debug:
[C]: FocusUnit()
..\FrameXML\UnitPopup.lua:1504: func()
..\FrameXML\UIDropDownMenu.lua:638: UIDropDownMenuButton_OnClick()
[string "*:OnClick"]:1:
[string "*:OnClick"]:1
AddOns:
Swatter, v5.11.5146 (DangerousDingo)
AucAdvanced, v5.11.5146 (DangerousDingo)
AucFilterBasic, v5.11.5146 (DangerousDingo)
AucFilterOutlier, v5.11.5146.2531
AucMatchUndercut, v5.11.5146.2531
AucStatHistogram, v5.11.5146 (DangerousDingo)
AucStatiLevel, v5.11.5146 (DangerousDingo)
AucStatPurchased, v5.11.5146 (DangerousDingo)
AucStatSales, v5.11.5146.2842
AucStatSimple, v5.11.5146 (DangerousDingo)
AucStatStdDev, v5.11.5146 (DangerousDingo)
AucStatWOWEcon, v5.11.5146.2530
AucUtilAHWindowControl, v5.11.5146.3311
AucUtilAppraiser, v5.11.5146.2530
AucUtilAskPrice, v5.11.5146.3175
AucUtilAutoMagic, v5.11.5146.3142
AucUtilCompactUI, v5.11.5146.2530
AucUtilEasyBuyout, v5.11.5146.3583
AucUtilFixAH, v5.11.5146 (DangerousDingo)
AucUtilGlypher, v5.11.5146.5061
AucUtilGlypherPost, v5.11.5146.5069
AucUtilItemSuggest, v5.11.5146.3108
AucUtilPriceLevel, v5.11.5146.2545
AucUtilScanButton, v5.11.5146.2530
AucUtilScanFinish, v5.11.5146.2530
AucUtilScanProgress, v5.11.5146.2530
AucUtilScanStart, v5.11.5146.4784
AucUtilSearchUI, v5.11.5146.3655
AucUtilSimpleAuction, v5.11.5146.4546
AucUtilVendMarkup, v5.11.5146.2530
AutoRepair, v
Babylonian, v5.1.DEV.130
BadBoy, vv6.499
BadBoyCCleaner, v3.26
BadBoyGuilded, v1.27
BadBoyLevels, v2.77
Bagnon, v4.1.1
BagnonForever, v1.1.3
BagnonTooltips, v
BeanCounter, v5.11.5146 (DangerousDingo)
Configator, v5.1.DEV.282
DebugLib, v5.1.DEV.275
Enchantrix, v5.11.5146 (DangerousDingo)
EnchantrixBarker, v5.11.5146 (DangerousDingo)
Gatherer, v3.2.3
HealBot, v4.1.0.0
Informant, v5.11.5146 (DangerousDingo)
nUI, v5.07.19 (Lite)
nUIInfoPanelHealBot, v4.1.0.0
nUIInfoPanelStats, v5.07.17
Omen, v3.1.2
SlideBar, v5.11.5146 (DangerousDingo)
Stubby, v5.11.5146 (DangerousDingo)
BlizRuntimeLib_enUS v4.1.0.40100 <us>
(ck=735)

I use set focus for DPS and healing. I NEEDS it.