I had some add-ons, but they were removed when I reset IE. Which version of Windows are you using? x-86 or x-64?
After zooming to 115%, try going back and forth between "Home Port" on the menu bar, and "Media Gallery" > "Our Fleet" > "Fleet Gallery" a couple of times.
FWIW, several people on several PC's see the problem, so it's not specific to my PC. I really like the tiled gallery, I'd hate to have to remove it and use something else. Thanks for you time.