UPDATE from Pattaya/Jomtien Chonburi Province Immigration...reported by the Pattaya City Expats Club:
THIS IS FOR PATTAYA/JOMTIEN ONLY...
We received recent first hand reports that Chonburi (Pattaya) Immigration is now requiring the TM.30 Address Report be filed by the homeowner/landlord/possessor within 3 days of a foreigner's return from a trip outside of Thailand, but still does not require it if the travel is within Thailand and you return to your previously reported address.