When I want to copy a screenshot to a vfat-usb-stick, I always get an error that the filename is invalid. The filename contains ":"-characters which apparentlyare not allowed characters in a vfat-filesystem.
I was not aware of this problem, because I used Nautilus on an Ubuntu-system. I upgraded a relative's computer to Xubuntu 14.04 and he noticed me, that he could not save a screenshot to his
usb-memory-stick. Renaming the file (eg. deleting the ":"'s solves the problem. I wondered why I didn't have this problem with Nautilus. Well, Nautilus is automatically replacing the ":" with an underscore
when writing the file to the usb-stick.
Can this feature be enabled, implemented in Thunar? Otherwise, one has to rename the files manually