I have come back to Next Gen after not using it for a while. I have created a .png watermark and pointed to it on the options page. My image is shown on the preview on the options page so I know I have the correct link. However when I select watermark the plugin indicates that the watermark is being applied however nothing is shown in the slide show either on the thumbnails or the main slideshow images.
Looking around there appears to be other people having the same problem.
Can someone help please?