I switched to 6x-dev because I wanted to be able to format CCK Date field on different nodes with this awesome countdown.

But unfortunately, unlike the stable 6x-1.7, the new 6x-dev does not recognize that the node is in another language. So if the node is in Greek it should work with jquery.countdown-el.js from the "jquery.countdown" forlder in libraries, so as to display "Hours", "Minutes" and "Seconds" in Greek language, but it doesn't work.