I'm sorry if it all sounds a bit too arcane for everybody, but it's whether you're going to go down one negotiating track or two negotiating tracks. What it's about is trying to get major developing economies more engaged in the mitigation issues.
The United States is forcing the issue by insisting that it will not sign on to the Kyoto Protocol as an amendment and hence will not participate in those discussions where developed countries are, down the track. So all developed countries now have said, and the EU is the last one to do it—and that's why it exploded in Bangkok—that they only want one negotiating track. The G77 and China see that as a betrayal of the terms of reference from the Bali action plan.
We'll see what transpires on Monday in Barcelona, but it could get pretty ugly.