[cellarius]

OK, please try the attached plugin. I added a check whether the icons are stored in the database or in the file system and act accordingly. Import the attached product file to test.

Mind you: I was able to see that there were no icons displayed at all if the icons were stored in the filesystem; this has now been fixed.

I still can't reproduce the issue where not thumbs, but the original sizend groups icons are shown. If pulled from the file system this should be impossible: the icons are taken directly from the respective "thumbs" folder in your filesystem. So if the images are too big, they're safed like that in there and there's probably nothing I can do. If this happens with images in the database: if there is the "type=groupthumbs"-parameter present, that should trigger image.php to show the thumb sized icons. This follows exactly the call from the groups.php.