So I had both Surround and AP on and the problem occured.
Turned off AP - problem still occurred
Turned off Surround - it hasn't occurred YET.

Fingers crossed, I have a 2 hour drive tonight and will know by then.

Thanks all for your input to date!

OK...final test seems to be AP On / Surround Off problem is gone. Not a fix..but at least I narrorwed it down. I still don't get the feeling that the dealer's going to do much more than "report it again". We'll see. If anyone else gets traction from the dealer on this issue, please let me know.

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PACayman
Factory: 2006 Cayman S / Lapis Blue / Stone Grey Full Leather & Heated Sport Seats with Crest.
Sport Wheel / Bose / Bi-Xenon / TPMS / Carerra S 19" with Colored Crest / PASM / Sport Chrono / Climate Control

After Market: Clear Bra / Aluminum Pedals / Sport Tip / De-Snork / Clear Markers