Over the last few months, there's been an increasing amount of talk about the modified Second Life viewer being used with Open Life Grid (a third-party virtual environment based on reverse-engineered and open-source systems and protocols). Most of the talk centers around copyright infringement -- or license violations, if you prefer.
It's claimed that the operators of Open Life Grid are failing to comply with the source-code licenses (the GPL with FLOSS exceptions) under which the Second Life source code has been made available. Now, while the issue has been reported to Linden Lab's license-infringement hotline, the issue is actually a bit trickier for the Lab than it would first appear.
You see, the viewer code contains contributions from a number of third-party contributors, each of which retains their copyright, intellectual property and rights to their contributions under the terms of the contribution agreement. All of whom have the right to commence their own actions.