On a.m. Page I found dead Link for "Donate" to <http://challenge.documentfoundation.org/> behind Κάνε δωρεά χρημάτων για την χρηματοδότηση του project:
Should lead to <http://www.libreoffice.org/get-involved/donate/>
localize this text link:
"Κάνε δωρεά χρημάτων για την χρηματοδότηση του project:"
it points to a dead link: http://challenge.documentfoundation.org/
instead of http://www.libreoffice.org/get-involved/donate/
Fixed, but only partially - there seems to be no Greek translation for the donate page, so linking to English one