This is just a quick update on presidential vetoes.
In Poland, as far as I can tell, President Komorowski has vetoed two bills since he came to office in August 2010.
As posted in January, he sent a Bill on the rationalisation of employment in the government-funded budgetary units to the Constitutional Tribunal.
In March, he vetoed a Bill on the establishment of a military aviation college in Dęblin. There is information here.
In August, as posted here, he vetoed a Bill on genetically modified organisms.
To confirm, Poland is not currently experiencing a period of cohabitation. So, President Komorowski is vetoing Bills passed by the government of his own party.
Perhaps not coincidentally, President Komorowski is extremely popular at the moment. There is a report on his high poll ratings here.