The immigration authorities in Thailand have restricted the number of times that one can cross the border at Laos, Cambodia, Myanmar and Malaysia for the purpose of visa renewal. These visa runs will now be permitted for a maximum of 2 times per calendar year. The reason for this change is to encourage people to apply for visas in advance, instead of relying on getting a 30-day visa at the immigration post upon arrival at the border. This restriction applies just to land crossings and not arrivals via the airport. In the latter scenario, people will still be allowed to obtain 30-day visas up to 6 times per calendar year.
The full story as reported on the Thai Embassy Website can be found here.