Yahoo! News seems to have broken page scrollability with the introduction of a recent design change.

Yahoo! News pages now set UI focus to the Search box whenever a page loads. This change seems to have happened sometime in the past 2 days. What this does is, it breaks the ability to scroll the page using the keyboard navigation keys or the scroll button in the mouse. I now have to click once outside the text box before my navigation keys will work.

Don't know if this was intended or happened by accident. If it was intentionally designed, it's just a bad idea as far as usability is concerned.

Setting focus to a text box is advisable only for pages where the text box is the most important element on the page and the user almost always will type something into the box. Like for instance, the Search box on the Google home page, or the Username box of a login page.