wodim and speed setting

[JD]

  For some reason, wodim is no longer honoring lower
speed settings, like 2 or 4.
It is always defaulting to 10+X.

I read on a blog that setting speed=0 in /etc/wodim.conf
will make wodim burn at lowest possible speed.
10X is hard;y lowest possible speed.

$ cat /etc/wodim.conf
CDR_DEVICE=/dev/sr0
CDR_SPEED=0
CDR_FIFOSIZE=64m

Even specifying a speed=0, or 2 or 4
on the command line has no effect.