From the DOJ website:
The Department of Justice today released two previously undisclosed Office of Legal Counsel (OLC) memoranda and seven previously undisclosed opinions. “Americans deserve a government that operates with transparency and openness,” said Attorney General Eric Holder. “It is my goal to make OLC opinions available when possible while still protecting national security information and ensuring robust internal executive branch debate and decision-making.”
The two memoranda memorialized that certain legal propositions in ten OLC opinions issued between 2001 and 2003 no longer reflected the views of OLC and “should not be treated as authoritative for any purpose.” They further explained that some of the underlying opinions had been withdrawn or superseded and that “caution should be exercised” by the executive branch “before relying in other respects” on the other opinions that had not been superseded or withdrawn.
The opinions and memoranda are available at http://www.usdoj.gov/opa/documents/olc-memos.htm.