Different ride height left to right. Normal?

[fstsven]

Hi, I recently noticed that when my car is parked on a perfectly level (garage) floor, the right front (passenger, in my case) side is 3-4mm higher than the left (drivers') side. When I'm not in the car, obviously. This is, of course, a small difference, and the car handles well, but still I'm a bit worried... Is this normal or do I need it checked out?
Greets

[Mr2Mike]

Springs on the drivers side nearly always settle a bit more than passengers side over time, but best to check and make sure you don't have any broken springs.