Newspapers make mistakes all the time and regularly correct those mistakes. But the corrective step The Oregonian took today is fairly unusual: The daily deleted free-lance columnist Dave Lister's April 12 column slamming State Rep. Mary Nolan (D-Portland).

Nolan is in a contentious race for Portland City Council against incumbent Commissioner Amanda Fritz. It's worth noting that Lister's column ran one week after The O endorsed Fritz

Here's what the daily published this morning:

Freelance opinion writer Dave Lister's Thursday column about state Rep. Mary Nolan's bid for Amanda Fritz's Portland City Council seat contained numerous errors about Nolan's campaign donors. The column has been deleted, and the following correction was published April 14 in Commentary and online:

Dave Lister’s column on Thursday (“Generous backers dwarf community funding,” Commentary, April 12) implied that several campaign donors were supporting state Rep. Mary Nolan’s bid for Portland City Council. In fact, most of the donors listed — Comcast, Portland General Electric, Oregon Trial Lawyers Association, Motorola, Walmart, Philip Morris and the Oregon Forest Industries Council PAC — had donated to prior legislative campaigns, not Nolan’s city race.

Donating to Nolan’s council bid were Portland Metro Fire Fighters PAC, $20,000; Local 189 Oregon AFSCME, $5,000; and the Confederated Tribes of the Grand Ronde, $1,000. Additionally, since she declared July 5, Nolan has raised more than $239,000 in campaign money, according to filings with the Oregon Secretary of State’s office. Lister’s column gave incorrect numbers.

Finally, the column may have implied Walmart had difficulty siting new Portland stores. Walmart has applied for a permit and plans to build a store at Hayden Meadows.