I think this has to do with: http://www.silverstripe.com/core-team-discussion/flat/1542?showPost=1547

In the gsoc branch I recently changed this line in jsparty/tiny_mce/tiny_mce_improvements.js from this:
console.log('respondToNodeChange');
to this:
// console.log('respondToNodeChange');

to get rid of similar message.

It seems like it is just a leftover debug message.

I could seem to find a reference to "NoRespondToNodePage" in my copy SilverStripe, but I would think that it is probably a call to console.log that needs to be removed.

Hope this helps,

Elijah