That is very very strange but I could reproduce it. What puzzles me is that the latest release I made was exactly for Firefox 3.5 and back then it worked, I tested it. I will have to look into this and will let you know whats the Problem. Meanwhile try the Editor I attached to this ticket, this one should work but its just a workaround that I dont want to publish yet. But you should be able to...
I did not find any XSLT files, how do you transform your files? Where can I find the transformation files? What formats do you transform to?
I did look at the structure but I was confused a bit. Do you have a documentation? I didnt find anything. For example, why do you define a metadata element instead of using e.g. the LOM standard?
So anyway, its difficult for me to really comment...