My current setup is Ubuntu 12.04 / Firefox 16.0.2 / Wordpress 3.4.2

Am trying to work with a WP theme called Modernize.

There are default option of image Sliders - Flex/Nivo available in the theme. In the setup page, the button "Select Media" when clicked is non-responsive and hence I am unable to upload images into the slider. I am finding the same result with Chrome as browser on Ubuntu.

I have used the same theme with Wordpress 3.4.2 on a windows xp machine with Chrome browser and it seems to be working fine.

I am unable to understand the exact problem. Is it something to do with Javascript ? I tested my browser with websites like javatester.org and the javascript is running just fine.

I wasn't sure which category should I post this in. I would appreciate any directions/feedbacks for diagnosing the issue.

Thanks Rakhoush