If you face problem in viewing tamil fonts in ubuntu, please follow the steps as below.

Here is the fix.

• Goto that directory /usr/share/fonts/truetype/freefont/
• Delete both the FreeSerif.ttf and FreeSans.ttf file.

sudo rm -f /usr/share/fonts/truetype/freefont/FreeSerif.ttf 
sudo rm -f /usr/share/fonts/truetype/freefont/FreeSans.ttf

Then restart your browser.

For details 
http://www.arulraj.net/2011/08/problem-viewing-tamil-fonts-in-chromium-on-ubuntu.html