Palestinian prisoners' release is delayed - but why?

Are the Israelis trying to destabilize Mahmoud Abbas with this leak?

JERUSALEM – Israeli officials said Monday they would delay the release of 250 Palestinian prisoners until next week because of a request by Palestinian officials.
They said the Palestinian officials had asked for the delay because President Mahmoud Abbas is out of the country and wants to be back in the West Bank to greet the freed prisoners.

Note that if they were immediately released they could spend eid with their families.

[From Israel to delay Palestinian prisoner release - Yahoo! News]