Originally Posted by
davewill
I've had this happen quite a few times. It's not something to worry about. In fact, I once had French border guards not even give me an entry stamp. They just waved me through with a bored look on their face. Had no problems later leaving Schengen.
Same experience and on several occasions. Last one only few weekends ago:
Entered France in London on Friday morning [Eurostar terminal], policeman didn't swipe or stamp my passport.
Upon leaving Luxembourg airport on Sunday late afternoon, policeman flipped through my passport [with quite a few Schengen stamps in it], asked me when and where did I enter, and after me telling him about Eurostar, just stamped it with an exit stamp.
I have been in quite a few situations where I got stamped on entry, but not on exit and vice versa. I even had a [wrong] stamp where it looked like I stayed a year and 3 days, instead of only 3 days
Worst culprits - French police.