Here's a story from the Post-Gazette, which is usually a great paper about transit in Pittsburgh: Transit pact a relief to riders.
Accompanying the November 30, 2008 story is this picture:
The caption says "Passengers board a Port Authority CL bus Friday on Smithfield Street, Downtown."
Which must be news to those in Clairton since the CL route was cut in June 2007. So yes, the Post-Gazette used an old photo from a 2007 story about the cutbacks.
Lying about when a photo was taken is bad journalism. It's also lazy: the Post-Gazette's offices are on Boulevard of the Allies downtown. There's plenty of buses that fly by there every day.
Update 12/3: After I emailed the P-G, the photo vanished from the story. Google's Cache still has it for now.