Efax running under some european locales may cause an error,
'efix error: bad units ...'.
It is due to the decimal string differ from '.' in some locales.

If you encountered such an error, update your efax to
efax-0.9a001114a7
or replace the fax script(/usr/bin/fax).

Visit,
http://shino.pos.to/linux/efax.html