I have seen this on occasion, it shuts off the ability to use the icons on the quest tracker, for this time I was attempting to use the "silken rope" to capture a serpent. Here is what swatter grabbed.
Code:
Date: 2012-11-04 08:07:25
ID: 1
Error occured in: AddOn: Carbonite
Count: 1
Message: Error: AddOn Carbonite attempted to call a forbidden function (UseQuestLogSpecialItem()) from a tainted execution path.
Debug:
[C]: UseQuestLogSpecialItem()
..\FrameXML\WatchFrame.lua:1427: WatchFrameItem_OnClick()
[string "*:OnClick"]:1:
[string "*:OnClick"]:1
Locals:
None
AddOns: (lots edited out)
Carbonite, v5.05.05
CarboniteTransfer, v1.01
BlizRuntimeLib_enUS v5.0.5.50001 <us>
(ck=ec5)