Europe is stunned?
Or is it really "Europe's snooty liberal socialist ELITES are stunned"?
If the eurocrats though voting would have endangered the approval of the constitution they never would have allowed it. In fact many smaller nations voted via parlament specifically for that reason.
I would bet the revote will be a popular europe WIDE vote where a blanket simple majority would rule. Thus a single country can be overridden by the populations of the larger approving populations. Individual nations would not matter.