The "Permalink" button located on the rightmost side, becomes just a button with "#" when i view the site using a Smartphone on a portrait position.

It returns back to normal "Permalink" when i tilt the smartphone on Landscape position. Then goes back to just "#" when tilted back to portrait position.

I notice that there is still plenty of room to display the word "Permalink" when the screen is in Portrait position. But why does it convert to displaying just "#" ???? Is this a bug?

I use a Samsung Galaxy II smartphone.