I've tried fiddling with the delay and it helps in some cases, but not all cases.
Additionally, I tend to get this error when a quest item is added to my inventory or I do a reload of the UI:
Code:
Carbonite\NxUI.lua:116: bad argument #5 to 'format' (string expected, got boolean)
[C]: in function `format'
Carbonite\NxUI.lua:116: in function `prt'
Carbonite\NxUI.lua:5901: in function `Update'
Carbonite\NxUI.lua:5421: in function `SetSize'
Carbonite\NxUI.lua:5388: in function `?'
Carbonite.Quests\NxQuest.lua:9029: in function `UpdateList'
Carbonite.Quests\NxQuest.lua:8483: in function `func'
Carbonite\Libs\AceTimer-3.0\AceTimer-3.0-17.lua:55: in function <Carbonite\Libs\AceTimer-3.0\AceTimer-3.0.lua:48>
Locals:
(*temporary) = "Key %s %s #%s %s"
(*temporary) = "K"
(*temporary) = "NxListFrms1"
(*temporary) = "28"
(*temporary) = true
(*temporary) = "string expected, got boolean"
I'm not sure what exactly the problem is here. For reference, I've got my "watch delay time" set to 1000 and it still kicks this error occasionally.