What records did Super bowl XLV break?

Answer 1

No records were broken by the playing in Super Bowl XLV, but two records were tied:

• Since the Pittsburgh Steelers made it to the Super Bowl, they tied the record for most Super Bowl appearances. The team is now tied with the Dallas Cowboys with 8 appearances each.
• The Green Bay Packers scored 14 points in the first quarter, which ties the record for most points scored by one team in the first quarter of the Super Bowl. They are tied with 6 other teams (the Dolphins, Raiders, Cowboys, 49ers, Patriots and Bears)

However, the Super Bowl itself broke a record:

• Super Bowl XLV was the most-watched Super Bowl and the most-watched single program of any kind in U.S. television history.