I've implemented the imagegallery in lightbox mode on one of our site and it work fine except when I click on the same image twice, then the image just won't load.
I went to look if it was working on your demo and it doesn't work either.
- Go to : http://demos.telerik.com/aspnet-ajax/image-gallery/examples/functionality/modes/defaultcs.aspx
- Select the LightBox mode.
- Click on an image
- Close the lightbox window with the X in the top right corner
- Click on the same image
The image just don't show up and the loading take forever.