I can use Firefox to open most sites/pages, but not eBay. I get a GIF 1x1 message on the tab, and a blank page. I was advised by eBay to upgrade to the 'latest version US of Firefox' and wonder if this has caused problems. I'm using an ancient Powerbook G4 Mac, running OS X 10.4.11. I also use Intego security for Mac. There have been problems on eBay via my computer - a refusal to open a feedback box on 'leave feedback' which I was able to use perfectly well via iPhone, but eBay say there IS a problem on the site, and they are working hard to fix it. Does anyone have any idea what is causing the Gif 1x1 and blank page problem? Am having to use Safari to reach eBay which is not my browser of choice!