I use Blender 2.49.2 on Ubuntu 10.04.
I can’t save my work on an existing file (with the command “Save”) or (with the command “Save as” if the file already exists).
To save, I have to use the “Save as” command and give a new file name so that it does not exist before the backup. Needless to say it is impractical and that automatic backups are not working.
I tried with the version installed with Synaptic, with standard versions for python 2.5 and python 2.6, which can be downloaded from the Blender website. The problem remains.
This seems to me both trivial and yet elusive …