When I open a pdf document (like an E-version of a newspaper) in Mozilla and then switch to another tab to view another webpage, I am unable to use the scrolling function on the touchpad. I have to use the up and down arrows to get other pages to scroll. When I close that pdf document, everything works fine. I talked with customer support with Dell, and he said it was probably a glitch with Mozilla. So I tried to do the same thing on IE, and there was no problem scrolling with the touchpad while a pdf document was open on another tab. I would like to get a fix for this so I don't have to keep closing open pdf documents in order to scroll with the touchpad while on other tabs. Thank you