While searching in Google, I use the up and down key to navigation up and down in the search results. Most of the time, it works fine. However, sometimes it doesnít work, so the arrow on the left hand side of a search result is not visible. The only way to navigate to the website is by using the mouse. Thatís uncomfortable for me. Is there a reason why it from time to time works and sometimes not works and is there a way to re-enable this feature?