Boston’s WBUR won’t go into details, and the syndicated show will run with a guest host Monday. The Boston public radio station WBUR has placed its most-well known host, Tom Ashbrook, on leave after receiving allegations against him. The station did not go into detail as to what the allegations were about. Ashbrook – host of “On Point,” a syndicated call-in show that airs on nearly 300 public radio stations – is the latest public radio figure to face allegations resulting in censure. Ashbrook’s home station, WBUR, issued a statement Friday announcing Ashbrook’s suspension but did not release details about the allegations or a timeline for his absence.