Here's more light: pop up the properties of a file called "threadedstorage01-20110301_v35-en_UK.deb" . Then accidentally hit the keyboard with your palm. Outcome:
KDE - you press the "cancel" button and you're set.
GNOME - watch the file becoming called "hjkyu" beyond repair. Then contemplate the zen essence of the lifeless gray area of the dialog where the "cancel" button would be.