thanks for the reply.... I'm thinking the same thing (about my big fat ass)... I'm pushing 240 myself.
I'm brining it in for service in ~2 weeks to have them check it out... I'm going to find the fattest guy in the place (usually the service manager), and have him drive it around to see if they can duplicate the problem...
FWIW, I did go back to the dealer and drove an identical car (with 7 miles), and couldn't duplicate the problem...
This is drivin' me friggin' nuts.... at this point, I'm going to push them to replace the seat... I've only had it 2 months (3300 miles)
If they find anything, I'll try to let you know.