When I tested the Mac OS X Server client this definitely happened.
I used ALL_LOCAL_DRIVES and it only picked up / (being ufs).  It
totally missed the hfs partitions.  The log files said they were
skipped because they were of a different type than /.

They backed up fine once I added them explicitly to the list of 
directories to back up.

>Good question, because when you use the ALL_LOCAL_DRIVES file list directive
>and you have file system types that differ from / on your client, it will
>miss those that differ.  I haven't been able to test this theory out, but
>one of my students last week brought it up as a problem in their site.
>
>David

-- 
Jeff Bryer                              bryer AT sfu DOT ca
Systems Administrator                   (604) 291-4935
Academic Computing, Simon Fraser University