[kismac] Strange popup message?

While testing a combination of Apple and Cisco access points on a network,
I was running kismac (in passive mode on an iBook), and this strange popup
appeared on several *other* folks' PowerBooks. Several times, on
several different PowerBooks, and yes, the wireless network did appear
to go down (several times) after the message(s) appeared:



I've never seen this before, nor did googling it turn up anything.
I strongly doubt kismac triggered it, but I'm not sure ...

Has anyone else seen this?  If so, do you know where it's
coming from and under what circumstances it's generated?

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