UPDATE: The Minister for Broadband, Communications and the Digital Economy, Senator Stephen Conroy, has this afternoon denied that the list of banned websites published on Wikileaks is the ACMA blacklist.

"The published list purports to be current at 6 August 2008 and apparently contains approximately 2400 URLs whereas the ACMA blacklist for the same date contained 1061 URLs," he said in a statement.

"There are some common URLs to those on the ACMA blacklist. However, ACMA advises that there are URLs on the published list that have never been the subject of a complaint or ACMA investigation, and have never been included on the ACMA blacklist."

[Conroy's] comments were backed up by one of the internet service providers (ISPs) involved with the trial of internet filtering.

The managing director of Tech 2U, one of six ISPs involved in a trial of filtering technology, told ABC News Online the list bore little resemblance to the official ACMA version.

"The list released on Wikileaks does not agree with the list which was provided to us earlier this year," Andrew Robson said.

"I don't know where this list came from, but our copy is kept very securely and only one person in the organisation has access to it."

The published list purports to be current at 6 August 2008 and apparently contains approximately 2400 URLs whereas the ACMA blacklist for the same date contained 1061 URLs.

There are some common URLs to those on the ACMA blacklist. However, ACMA advises that there are URLs on the published list that have never been the subject of a complaint or ACMA investigation, and have never been included on the ACMA blacklist.