[Fizzlemizz]

According to LibQtip, AddLine returns a number so at 142:

line = tooltip:AddLine(npc.name, npc.item, format("%d/%d", count, 5))

then at 144 you:

tooltip:SetScript(line, "OnMouseUp", UseTomTom, npc)

QTips prototype for it SetScript function is:

function tipPrototype:SetScript(scriptType, handler)
    RawSetScript(self, scriptType, handler)
    ...

I'm not sure line as the first parameter of the SetScript call is correct.

tooltip:SetScript("OnMouseUp", UseTomTom)

I don't know LibQTip so maybe I'm missing something.