Sky challenges Skype over logo Jennifer Whitehead, marketingmagazine.co.uk, 10 August 2010.
“…over attempts to register its bubble logo trademark because it is concerned it could be confused with Sky.”
Justified? Seemed a bit of a reach to me. I’ll see if I can find information on what happened in this case and post an update. I believe both logos have remained much as they where in 2010. Meanwhile why not remind yourself of the two logotypes: Sky & Skype