I am not sure whether this has happened ever before, but the European Parliament is asking the EU Council to postpone the European Council ('summit') which is planned for 18-19 June until 25-26 June.
According to the press report, MEPs want to have more time to reflect on the future EU Commission President who is supposed to be put forward at the European Council.
The same article mentions rumours that say that Poul Nyrup Rasmussen (attention: Don't confuse!), President of the European Socialists, might be put forward as candidate for the Commission Presidency.
These are excellent news for the Anyone but Barroso! campaign - and its a sign of maturity of the Parliament that it demands "its" time to reflect on the EU Commission President. The Parliament seems to be willing to take a much stronger role in this issue, and sends these signals to the member states. Asking for to postponement of a meeting of heads of state and government is a major issue, not a mere detail.
It will be interesting to see how the Council and the EU members react.