...because Windows is such a well loved brand!

This guy created Citrix? Sounds like they'll need to build a whole new nastier level of hell to accommodate him. Citrix is one of the worst products ever made. Years later and it's still clearly nothing more than a nasty hack. Give me a Citrix box and I'll give you back a p0wned box. As for OS/2, well that just makes me sad.

This isn't just about copyright notifications. The version of DOSBox being used in this distribution is a modification of 0.70. It was clearly modified on a source level as the exe is now dependent upon the existence of certain Steam libraries. This has been confirmed here:

http://vogons.zetafleet.com/viewtopic.php?t=16285& postdays=0&postorder=asc&start=60

Running the modded DOSBox.exe in it's own directory first complains about missing SDL libraries. After adding those, it will them complain about missing Steam libraries. This is clearly a derivative work under the terms of the GPL and the source code has not been made available.

So Valve/Id have to go down one of two roads now:

1) Release the derivative source and give us valuable insight into how their DRM Steam engine works.

2) Pull the release and piss off a ton of people on Steam.

Either way - Valve is in trouble here. What kills me is that instead of protecting the game executables, they protected the GPLed Emulator they use to run them. What a bunch of idiots. If you ever needed a reason to hate Valve and Steam, they've just handed it to you on a silver platter. I mean isn't it ironic that for all the DRM in Steam designed to protect their own copyrights, that they manage to trample on the copyright of several people in the process and they just don't seem to care?

Ironic.