The Red C poll in today's Sunday Business Post also indicates gains for the Greens, and for Sinn Féin.
The political fall out from the Lisbon Treaty Referendum does not seem to have hurt Fianna Fáil as it retains the 40% support it got in the last Red C poll in May.
However, Fine Gael has dropped three points to 25% since the last poll in May, which is the fourth month in a row the party has lost support.
Labour has stayed at 10%, while the Green Party increased by 2% to 7% and Sinn Féin, the only Dáil party to oppose Lisbon, gained 1% to 10%.
The PDs are unchanged at 2%. Independents and others are also unchanged at 6%.
On the recent Lisbon Treaty Referendum the poll found that around three-quarters of No voters polled believed Lisbon would change corporate tax rates and reduce Ireland's influence in Europe. It also found that two-thirds of No voters polled believed the treaty would make abortion more likely. In contrast about a third of Yes voters believed Lisbon would have those effects.
Looking at the referendum by party the poll finds that two-thirds of Fianna Fáil supporters and more than half of Fine Gael backers voted Yes, while a 'large majority' of Labour Party supporters said No.
