IPN first and last name issue with cyrilic alphabet

[MK514]

When I receive IPNs with profiles having Greek Names for examples, I am not able to get the right information in my mysql table.

I can see a line like this: 

Is it due to Paypal or a bad setup on my php code or bad setup of the mysql table ?

MySql table settings are :

Default table collation: latin1_swedish_ci

first_name and last_name fields collation: latin1_swedish_ci

Thanks.