How are thumbnails created in Knoppix 7.2?

[Werner P. Schulz]

Not only PCManFM but also the filemanager Konqueror and Dolphin uses '~/.thumbnails' and the graphical tools like GPicView, GThumb or Gwenview. But Nautilus uses '~/.cache/thumbnails'.

You can delete or rename this folders or their subfolders "large" and "normal" without any risk; they will be recreated the next time whenever a filemanager or a graphical tool creates again thumbnails.