Randall Hoven does yeoman work in this post, producing a laundry list of over 60 members of the MSM--many of whom are very big hitters indeed--who have been caught very publicly cooking the books:

Offenses include lying and fabricating, doctoring photos, plagiarism, conflicts of interest, falling for hoaxes, and overt bias. Some are hilarious, such as an action figure doll being mistaken for a real soldier. Some are silly, such as reporting on a baseball game watched on TV. Some are more serious.

And check out the 1998 quote from Bernard Kalp at the top of Randall's post; it very much places a laundry list of my own from a couple of years ago into context.