I had the plugin set to 6 thumbs with paging to use [nggallery id=xx] - when I create the galleries via "import image folder" only 6 thumbs were created.
Now I have switched to "0" in the thumbs per page to have all the thumbs visible in a post. Of course only 6 thumbs were visible.
I went to the gallery managment, and tried a bulk action "create new thumbs" - it doesn't work. Still 6 thumbs.
I have to delete the pics of a specific gallery, reupload to server via ftp and then scan folder for new pics, to make it work.
Thanks!
Gabriele