Fedora Core 5 (Greek) when configured to use the DejaVu fonts as the main fonts. The DejaVu fonts are available from Fedora Extras (use the Package Manager to install). You then need to edit /etc/fonts/fonts.conf by replacing “Bitstream Vera” with “DejaVu”.
This is 10pt, which is closer to the default size (is the default 10pt or 12pt?).