I've made someone nauseous with an X3 (on a test drive, the purchase was vetoed in favor of a 5-series because of that), but never anyone in one of my X5s except myself!

The upper deck of a highway here had just been repaved and there was still a depression at every joint. Going over those rhythmic bumps for a few miles made me oh-so sick.

OP, do you have adaptive drive? I personally think that the current flock of E70s are pretty bouncy without it. Perhaps that's what set 'em off. My E53 had the 'you can't change the setting' sport suspension (ie teeth chatteringly stiff), and both my old E70 and new E71 have adaptive drive. I drive in sport mode almost all the time because I can't take the 'bouncy'. (Except today when I had 700lbs of rocks in the back -- I'm getting all kinds of eyes loading that kind of stuff into an X6 )