Hi,

if I use
#+BEAMER_FRAME_LEVEL: 2
and export the entire document, the export is done correct.
First level ("*") is translated as section, second level headlines
("**") as slide titles and third level as headline for content of the
slides.

However, if I only want to export a subtree it does not work. Now,
first level headlines are omitted, second level headlines become
sections in the latex file and third level headlines are missing.
If I set
#+BEAMER_FRAME_LEVEL: 1
subtree export is working again as desired but sure export the entire
document is now wrong.
My guess would be that the subtree export is not taking care of the
#+BEAMER_FRAME_LEVEL property correctly. But this would not explain
why headlines are omitted.

Please find attached a minimal example to reproduce this behaviour.

Thanks

Torsten