When I visit wtap.com (a local news site), the images used for the links in the Top Site tab become blank. The only way I can get them to come back is to clear the data cache, force stop the firefox browser, start the firefox browser. After doing this, the default images are displayed. If I visit each site, then the image is replaced by one provided by the site. However, if I click the wtap.com site link, they all go blank again.