First create a new DVD data project and add a file with a long filename
(longer than 103 characters)
Under project filesystem properties enable Joliet, UDF and RockRidge.
Burn the image to DVD: k3b will ask you what to do with the problematic
long filename -
either shorten it to 103 characters ("shorten filenames") or to disable
joliet.
Shortening the filenames for joliet will also shorten the filenames on
rockridge and udf which is totally unexpected - please fix this
Thanks