hmm... not sure about the MP3 be something to look into - but then again technically JPG format you require a licence for, not sure how many have been following the court case about the company who developed it.
However its too little to late on thier part cause they can't sue everyone and it would make unfair bias to just sue a few companies
There used to be a Licence setup of £1,000 per titles, however that was dropped before release - not sure why because from what i understood it was only for programs that were to be commercially exploited, however the actual determination would be a very broad definition wouldn't it?
Pro itself now is completely free to commercially use, no strings like source sharing or such - however if you use external data forms suchas Quake's BSP, MD3, or DivX or alike then please read up on thier useage licence
mainly because if you come crying to DBS about it then there is little they can do cause it isn't included in the DBpro licence
Anata aru kowagaru no watashi!