■ Correction: Because of an editing error, the wrong photo ran in yesterday’s Metro section with the GlobeWatch column about the traffic signal on Surface Road at South Street.
■ Correction: An Associated Press story in Wednesday’s Nation pages about drug interactions between heartburn medications and the blood thinner Plavix misidentified Johnson & Johnson’s Mylanta as part of the H-2 blocker drug family. Mylanta is an antacid.
■ Correction: Because of a reporting error, an article on religion and economics in last Sunday’s Ideas section mischar-acterized Charles M. North’s research. He found that the medieval church developed private property protections to guard only against secular rulers, not against popes and bishops.
The Globe welcomes information about errors. Information may be sent to comments@globe.com or left in a message at 617-929-8230. Other Globe contacts, A3. 
