Problem with untagged files

[Budgie]

Hi Simon, Will try the port you suggest. On the two Bubble control apps, my point is that although the screens and usage are similar they behave differently with the same file. I had expected them to behave in the same way even if they are controlling different renderers.

I have installed qtfaststart a python version of qt-faststart and run it on the first five files. Assume all is now well unless I report otherwise.
Many thanks for your help once more.
Budgie