Please check the linkURL entries in your gallery's XML file.
The 'Open Image' button opens the corresponding linkURLs. In order for the images to be used, the linkURLs must either be the same as the imageURLs or empty (in which case Juicebox will use the imageURLs by default).
It sounds like you might currently have the URL to your home page as your linkURLs.
Thanks, that fixed the problem. However, is there a way to automate this? Because on a large gallery it will take considerable amount of time to delete all of them manually.