What is the world record for the 50 meter freestyle?

This question has been answered on Answers.com many times before. But, again, here it is:

The world record for the men's short-course 50 meter freestyle ('short-course' meaning the event is swum in a 25 meter pool) is held by Roland Schoeman of South Africa with a time of 20.30 seconds. It was swum at the 2009 South African Short Course Championships.

The world record for the men's long-course 50 meter freestyle ('long-course' meaning the event is swum in a 50 meter pool) is held by Cesar Cielo with a time of 20.91 seconds. It was swum at the 2009 Brazilian World Championships, which is organized and run by the Brazilian Aquatic Sports Confederation (CDBA).