Funny, I was going to post a similar story just last week when I noticed a difference in the ForkenSwift. Not the gliding so much, but it seemed to be riding much more "cushy" than usual... Sure enough all tires a bit low, one way down.
Corrected! Can now tell again whether a penny is heads or tails when I drive over it.
Did I learn my lesson and go check the Flea? Um, nope. Tomorrow!