This is a question which seems to have many hits but doesn't seem to have a real solution.
I'm not the greatest power user in the world but I can use terminal (as in apt-get, running sh files) I also have K3B which I found from other threads to use. It also said to use UTF.
The settings I have used in K3B are:
Create Image = Yes.
Verify Written Data = Yes.
Speed = Auto.
Under File System Tab:-
File System = Very Large Files (UDF)
The ISO needs to be bootable (if that makes a difference).
I have been through many threads, many of them old and out of date, I would be forever grateful for anyone who helps me.