It happened with pictures from different cameras and different persons. It happened sometimes that 1/3 of all images had no thumbail in Salamander (see
this screenshot or
this screenshot), but in Windows Explorer, XnView etc. they worked fine, but those programs are lacking too many file management capabilities. Switching on "ignore original thumbnails stored in image files" was soooo slow. I was really unhappy with the situation so I looked for a
workaround and found one: For each image that shows no thumbnails, call Plugins > PictView > Update Thumbnail. Of course, you have to repeat this every time an image has been modified by another program...
Hence, that workaround makes only sense for picture folders you don't touch any more, i.e. your best-of image collection where everything is edited, rated, geo-tagged etc.
