Don't .jpg files have some patent issues with them? I would avoid using .jpg and .mp3 files in any commercial project unless you don't mind paying and instant $10,000 for a license.
Talking about that, would that apply for website designers? Most web images are in .jpg (and flash components use .mp3 files )and if a company is selling a service to design a websites whether from pre-designed templates or custom templates, would this licensing apply? If so, there would be no point in designing websites because no website would sell for $10,000 in the first place.