I think he meant cross-country transfers, i.e. when you use IBAN. They are not free, as far as I know, in Czech Republic and Slovakia, both being a member of Schoengen zone, Slovakia even has Euro.
This means that if your bank charges 0€ for national transfers, it cannot charge for SEPA ones (the ones with IBAN). But it could in theory charge for national and SEPA wires.
http://en.wikipedia.org/wiki/Single_Euro_Payments_Area#Misco...