Heh. I had the opposite in China earlier this year. Entry was fine but when I left I got the SSSS. First time in... I can't think how many years. Didn't even notice it at first it had been so long. Mind you, I know exactly why I got that and as a side comment to the Chinese Security Services: screw you guys, I was going home! (&, you should have been looking during the other direction of travel. )