I think that the Polish government realizes that whoever comes in after Bush is likely to want to take US foreign policy in a different direction, and will likely drop the provocative installation of an ABM site in Poland and the Czech Republic, leaving them high and dry, so the delay in the missile defense pact announced by the Polish defense minister is a way to kick the football down the road to the next administration.
The translation from bureaucrat-speak is, “Sod off you short-timer incompetent prats.”