23% undecided is quite large...
Leaving undecided voters in the polling results, Liberals would obviously be less than 50%, and is the only party with more support than there are undecided voters.
It's actually suspiciously high... my immediate thought is if it is true - 23% undecided, this close to the election suggests a typical protest electorate, therefore very unpredictable.
My interpretation is generally that a high number of undecideds are people who don't want to vote for the party they have voted for all their life (typically a governing party, but could be an opposition that is well and truly unelectable). They don't want to vote for the party they have never voted for and are waiting for the party they support to offer them something that will convince them to not vote against their party - and virtually any excuse will do (but if they don't get the excuse, they will reluctantly vote against the party that they fell has let them down so badly... see Qld Liberals 2001, NSW and Queensland Labor in the last election in those states).
I thought that Labor distancing itself from the Greens a few weeks ago might just have offered them the excuse they needed, but this poll suggests possibly not/voters saw it as cynical, given the Parliament had already risen.
