The code was GPL, but kolibri did replace copyright headers and that was Ville's main gripe. Whether or not that breaks the GPL, I cannot say (they kept his name in the license file).
Ville, in response to who forked it: "Coders from Ukraine's eastern neighbor. And closed source seems to be a quite good way of getting rid of their forum spamming (to use a polite expression)."
It's kinda difficult to believe that the copyright headers were the core of the issue to close down the project. They also talk about spamming the forums. There must have been other major disagreements / antipathy.
If BSD had to split apart their additions with the original unix code, then that means copyright headers should be avoided/obsoleted and only a vcs based historical viewing (who committed what) should be allowed. Since whatever anybody writes contains a copyright itself.
> KolibriOS has forked off from MenuetOS in 2004, and is run under independent development since then. All our code is open-source, with the majority of the code released under GPLv2 license.
