The font used in Mathrubhumi site is Meera Unicode. If you are using Internet Explorer, Firefox or Google Chrome you will be able to see the site properly, even if this font is not installed in your computer. But, for some browsers installation of Meera font is a compulsion for a proper visibility of the site.
If you are using a KDE desktop, start the 'KDE Control Centre'. Under 'System Administration', there is a 'Font Installer' utility. Switch to the Admin mode to install the new font from the font installer.