4.2 removed the keyring , therefore you get this on ptr:

Date: 2011-05-28 12:09:42
ID: 3
Error occured in: Global
Count: 5
Message: ..\AddOns\Bagnon\main.lua line 242:
attempt to index global 'KeyRingButton' (a nil value)
Debug:

Bagnon\main.lua:242:
Bagnon\main.lua:237

..\FrameXML\MainMenuBarMicroButtons.lua:267:
..\FrameXML\MainMenuBarMicroButtons.lua:255
AddOns:
BlizzBugsSuck, v4.0.3.2
nLog, v5.1.DEV.292
Swatter, v5.1.DEV.300
WowheadLooter, v40017
Ace3, v
AddonLoader, v2.0
Babylonian, v5.1.DEV.130
Bagnon, v2.18.0
BagnonBrighter, v1.2.0
BagnonForever, v1.1.3
BagnonTooltips, v
BrokerLFD, vr48
BrokerSysMon, vr70
CallbackHandler10, v
Chatter, v1.0
Clique, vv40100-1.3.5b-1-ga532b78
Configator, v5.1.DEV.286
Constructor, v<%version%> (<%codename%>)
DBMCore, v
DBMTools, v
DebugLib, v5.1.DEV.275
DropTheCheapestThing, vv3.5.3-1-g6e1301f
DSDS, v1.4
EJExport, v1.0
ezInterrupt, v1.1
Grid, v4.1.0.1441
GridAutoFrameSize, v2.4.2
GridStatusAFK, v3.2.0.42
GridStatusRaidDebuff, vv3.1
GridStatusRaidIcons, v40000-2
GridStatusRDCata, v1.1
GTFO, v4.4
idTip, v2.0
InspectEquip, v1.9.2
InspectFix, v2.6
JewelTips, v0.7.2
LibBabbleBoss30, v
LibBabbleZone30, v
LibBossIDs10, v
LibCandyBar30, v
LibCrayon30, v
LibDataBroker, v
LibDBIcon10, v
LibExtraTip, v<%version%> (<%codename%>)
LibMapData10, v1.0.86
LibQTip10, vr152-release
LibQTipClick11, vr10
LibReforgingInfo10, v1.0.4
LibResComm10, vv78
LibSharedMedia30, v3.0-62
LibSink20, v
LibStub, v
Outfitter, v5.2.2
RatingBuster, v
RatingBusterAlwaysBuffed, v
Recount, v
ShadowedUnitFrames, vv3.3.5
SlideBar, v5.1.DEV.272
SmartRes2, vr162
Spamalyzer, v@project-version@
SpeedyActions, v
Stubby, v5.1.DEV.130
TimeToExecute, v0.2.8
TipHelper, v<%version%> (<%codename%>)
TomTom, vv40100-1.3.3
Transcriptor, v3.4
UnicodeFont, v
WIM, v3.5.4
BlizRuntimeLib_deDE v4.2.0.40200 <public-test.logon.battle.net>
(ck=64d)

Yep known issue :)

Should be fixed in the upcoming 4.2 beta