Milter-greylist

Hi,

I just packaged smf-sav, then I read this in the readme:

------------------8<----------------
If you are using the milter-greylist milter, please, bear in mind that
it has an incorrect proposition about the Sendmail macroses
configuration. This one can break the smf-sav milter functionality.
--------------------->8-------------

So, I halted the instalation for now.

Can someone please, elaborate what the problem really is? 
Or if there really is a problem?
Does anyone here uses this milter (smf-sav)?


Thanks,

Raul Dias