The Internet Watch Foundation (IWF), the nonprofit group that blacklisted the Web page, announced on Tuesday that it has reversed course on the matter, although it still believes the image is potentially illegal in the U.K. The image in question is of a naked and possibly underage female on the cover of a 1976 album from German rock group The Scorpions titled "Virgin Killer."

"In light of the length of time the image has existed and its wide availability, the decision has been taken to remove this webpage from our list," the IWF said in a . About 95 percent of U.K. ISPs (Internet service providers), by Wikimedia's estimate, block Web pages based on IWF's list.

, the nonprofit operator of Wikipedia, praised the IWF's decision. "We are grateful to the IWF for making this swift decision, and to thousands of Internet users from around the world for their outpouring of support," said Sue Gardner, executive director of the Wikimedia Foundation, in a statement.

Upon finding out that the article had been blacklisted, Wikimedia on Sunday , saying the move amounted to censorship and pointing out that the block had disabled most U.K. residents' ability to edit Wikipedia articles.

Wikimedia further argued that the block unfairly targeted Wikipedia because the image is available broadly across the Web, including at giant online retailer Amazon.com, which, according to Wikimedia, sells the album. Amazon.com didn't respond to a request for comment on Monday. Neither the article nor the image has been determined to be illegal anywhere in the world, according to Wikimedia.