Odd that you mentioned this.

I have found this happening on my '00 5spd. When cruising at top gear at low rpms...(under 3000 rpm), I will feel a split second hestitation. Its hard to explain, but the best way to describe it is if the clutch was pushed in for a split second causing the car to slightly lose its forward momentum...and then regains it.

Its only for a second..and probably not noticeable to a passenger, but the driver will notice. It also doesnt happen all the time. Maybe once a month?

Very odd. I never thought of bringing it to anyone b/c it will most likely never happen for them.