Can anyone tell me how to fix the font on yahoo home page?

Sounds like you are changin it without realizing you are! You might be using the scroll button on the mouse while the control key is pushed? Try it once!

Windows XP Go into your Control Panel by first clicking on the Start Button. Then click on the Control Panel icon located in the right column of the Start Menu. If your Start Menu is set to the Classic View, then begin by clicking on the Start Button. Then click on Settings, then click on the Control Panel icon to open up the Control Panel. Now, Double click on the Display icon to open up the Display Properties Window. Then click on the Appearance tab at the top of the screen. At the bottom left side of the screen you will see an area to change the Font Size: Use your mouse to switch between normal, large and extra large according to your preference. Then click on the OK button to save your changes and exit Display Properties window. Windows XP will immediately adjust to your new Font Size without restarting your system. Then close the Control Panel to return back to your Windows Session.