Trips:
I've noticed it too. I broke the left rear hub after a couple of weeks(why do race organizers put a hairpin after the mainstraight facing a concreet wall???), after I replaced it I noticed that left rear appeared to have a different toe angle. But I couldn't feel anything funny on the track though, so I thought it had to be an optical illusion(as Losi said).
Do anyone know how to drop som weight from the chassis???? Except for exchange it with the Graphite upgrades???? The graphite things are quite expensive where I live(Sweden, the prices are aprox 2x the US prices) so I was looking for a way to get rid of some weight without byuing more parts. Have a look at Kindwals XXX-S, they took away A LOT of material on that baby car..... I wonder if the stock parts starts to flex if I take out my Dremel and starts grinding on the chassis.