sidebar widget

Hi,

all the pages in the site http://thinkdif.co.il
have the same ‘page layout’ with right sidebar.
on one of the pages, the font at the side bar menu are BOLD?

this is the page with the bold side bar: http://thinkdif.co.il/about/testimonial/
comparing to other page with normal side bar menu: http://thinkdif.co.il/about/%D7%94%D7%9C%D7%A7%D7%95%D7%97%D7%95%D7%AA-%D7%A9%D7%9C%D7%A0%D7%95/

any suggestion what cause this bold menu and how to fix it?

Thanks
Tal