I am sure a lot of you remember the great "GIF fiasco" : more than a decade ago, Unisys decided to make money out of the most used image file format on the Internet : the GIF format. To be more precise, Unisys announced that they would go after developers of programs able to load and save GIF files (never mind the fact that even back then there was plenty of free software which wouldn’t have been able to pay).

Read the complete story here. (Free Software Magazine)