I created an Image gallery - simple folder version on a page. The thumbnails have unattractive, thick black borders on the top and bottom. What can be done to eliminate them?

Also, when I click on an image, two thumbnails appear on the left. The top one shows one image from the gallery with what appears to be 'clock hands' showing 9:00 superimposed on the image. Clicking this returns to the thumbnail view. The bottom left one is the previous image (expected) and the one on the right is the next image (also expected).  What is going on with the oddball image?

The functionality is brilliant, but I will agree that ascetically it isn't all that pleasing. You can however change the default Black box to a more pleasing color in Web.config by changing value FolderGalleryImageBackColor and FolderGalleryImageBorderColor.

You can also add such things as a background color and margins to foldergallery class in your template's styles.css file to make it look a little more cleaner.