[majewsky]

It's not a copyright issue, it's a trademark issue. Anything resembling the trademark can be considered an infringement, and it's up to a judge to decide what is.

[Double_a_92]

Then it must be really completely different. Something like "ChameleonOS" would also infringe the trademark since that animal as logo for an OS is also protected?

[majewsky]

IANAL, but if they went with ChameleonOS and their logo looked sufficiently different from any SUSE logos, they should be in the clear.

[jacques_chester]

Trademarks can be shared through contract easily enough; this is more or less already happening.