In eBay, I was trying to upload pictures when I got this message: "You need the latest version of Adobe Flash Player to use the standard picture uploader. Download and install the latest version from Adobe before continuing." In YouTube, when trying to watch a video, I got this message: "You need to upgrade your Adobe Flash Player to watch this video." I have gone through the procedure for downloading and installing the latest version of Adobe Flash Player, but still get the same messages when I reopen Firefox and revisit these sites. There does not seem to be the same problem with Safari, which runs the latest version of Adobe Flash Player with no trouble. I am using an iMac running Mac OS X Version 10.6.7.