"Clearly the release of this now is backfilling for Gonzales's confirmation hearing," said I. Michael Greenberger, a senior Justice Department official in the Clinton administration who now heads the Center for Health and Homeland Security at the University of Maryland. "These memos have been a tremendous source of embarrassment to both Gonzales and the administration."

The prior definition of torture was widely criticized.

One of the most controversial provisions of the earlier memorandum, signed by Levin's predecessor, Jay S. Bybee, was an assertion that the president's executive powers were sufficient to permit tolerance of torturous acts in extraordinary circumstances. The International Committee of the Red Cross had declared in response that the prohibition on torture, embodied in a global convention signed by the United States, has no exceptions.

Here's the new definition:

Acting Assistant Attorney General Daniel Levin said in the new memo that torture may consist of acts that fall short of provoking excruciating and agonizing pain and thus may include mere physical suffering or lasting mental anguish. His opinion is meant, according to its language, to undermine any notion that those who conduct harmful interrogations may be exempt from prosecution.

There's more:

The memo, which states that it "supersedes the August 2002 memorandum in its entirety," also drops an attempt in the earlier version to rule that harmful acts not specifically intended to cause severe pain and suffering might be legal, and to define "specific intent." Instead, it deliberately left the notion of "specific intent" undefined to avoid, Levin wrote, any notion that conduct amounting to torture might under some circumstances be considered legal.

Human Rights Watch gives the memo some back-handed praise:

Tom Malinowski, Washington advocacy director for Human Rights Watch, which has been critical of the Bush administration's legal opinions regarding the treatment of detainees, gave the memo a generally positive review and said its "definition of torture is not as tortured as it was."

Sounds like the only person unhappy with the new memo is Law Professor John Yoo, who wrote the first memo...the memo that authorized torture.