Stupid Question: How do you customise Mr Seigo's new tooltips?

[daniel@xxxxxxxxxxxxxxxx]

By "tool tips", I actually mean the "descriptive text and icon boxes" that 
appear when you mouseover a Kicker button. I was messing with my 
look-and-feel the other day and somehow managed to apply a "black text on a 
black background" theme: which isn't helpful. I searched through the Control 
Centre to try and find what I changed, but no cigar :).

Will someone enlighten this poor beleaguered idiot?
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