The post office in downtown Fairbanks is implementing some changes due to “repeated vandalism.” The lobby will now only be open from 6 a.m. to 6 p.m. on weekdays, and from 6 a.m. to 1 p.m. on Saturdays. There’s also no more 24-hour P.O. Box access. A spokesperson with the U.S. Postal Service tells Your Alaska Link this is to protect the mail and customers who access their mail after business hours…