Palestinian officials have denied reports that Mr Arafat contemplated using that speech to take the drastic step of a unilateraldeclaration of Palestinian statehood.
If the sense takes hold that there is daylight between Washington and Jerusalem, the problem will not be confined to the train-wreck in the making of yet-another Palestinian unilateraldeclaration of independence.
The new call marks a move away from Egypt's past compliance with the United States and Israel, which have strongly opposed the Palestinian authority's campaign to win backing for a unilateraldeclaration of statehood.
Coalition President Moaz al-Khatib is known to oppose the unilateraldeclaration of an interim government, fearing it would deepen divisions and impede any progress towards a transitional body which could bring about a transfer of power.