I know for a fact there were a few furniture changes and a pool rehab a few years ago.
ETA: Ah yes, here it is. I'm assuming that the schedule came about as part of the conversion of many of the room at Jambo house to DVC.
"Work began at Disneys Animal Kingdom Lodge in early August 2008 with the interior construction of 1058 guestrooms and corridors. The interior renovation is a fast track project consisting of interior paint and upholstery modifications, modify armoire to accept new LCD flat panel TVs, bedroom carpet, balcony paintings, new furniture, FF&E moving and storage, and new window coverings. Schedule consists of taking down and renovating approximately 50 rooms every week, keeping the remaining rooms and resort open and completely functional. Completion of the guestrooms is scheduled to be completed by August 2009." http://tatroconstructionco.com/projects.html