On some of my posts, I include an occasional application screenshots. The better ones that I have done may look something like this one of f-spot (which I made when frustrated with the quality of a screenshot in a presentation I was reviewing).
You might notice that it has really nice shadowing. Too nice. Casual consipracy theorists could get the idea that my blog might be supported by a cadre of Novell graphics people as part of a underhanded–even dastardly–marketing effort by Novell.
However, if you have ever tried to screenshot an application while using Compiz, have probably found some issues.