I just have a look to some website which is using Nokora on latest Firefox(14.0.1) of Windows XP, I saw Nokora is not working fine, check it at Google Webfont.
Go to check the same website with Android mobile, it’s working fine.
Please have a look to the screenshot of http://quote.seuksa.com
Now Nokora font issue as stated above is solved. Thank Dah Hong to correct this error.