Another taint problem

[Chmee]

9x <event>ADDON_ACTION_BLOCKED:AddOn 'nUI' tried to call the protected function 'TargetFrameToT:Show()'.
<in C code>: in function `Show'
Interface\FrameXML\TargetFrame.lua:812: in function `TargetofTarget_Update':
Interface\FrameXML\TargetFrame.lua:104: in function `TargetFrame_Update':
Interface\FrameXML\TargetFrame.lua:145: in function `OnEvent':
Interface\FrameXML\UnitFrame.lua:483: in function <Interface\FrameXML\UnitFrame.lua:481>:

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As I recall, I was fighting something or other. nUI+ 5.07.19