AOL Time Warner ( AOL) reportedly decided late Tuesday to certify its financial results in time for Wednesday's deadline. According to press reports, AOL Time Warner will sign SEC the forms despite an ongoing investigation into accounting practices at its AOL unit. The company said it will make an announcement related to certification later this afternoon. In other news, David Colburn, the blustery former head of AOL's business affairs unit, has left the company. The Washington Post said Colburn was fired last Friday and locked out of his office at the company's Virginia headquarters. AOL confirmed Colburn's departure, but would not comment on the details of it. The latest shakeup follows the departure of AOL's chief operating officer, Bob Pittman, in July.