mount version older than kernel

[John Kuhn <John.M.Kuhn@noaa.gov>]

I get the following error in syslog when I try to mount a remote HP-UX
filesystem on my Debian woody box:

May  1 09:05:34 topaz kernel: nfs_get_root: getattr error = 5
May  1 09:05:34 topaz kernel: nfs_read_super: get root inode failed
May  1 09:05:34 topaz kernel: nfs warning: mount version older than kernel
May  1 09:05:34 topaz kernel: nfs_get_root: getattr error = 5
May  1 09:05:34 topaz kernel: nfs_read_super: get root inode failed

I am using mount 2.11n-4 and kernel 2.4.18-bf2.4.  According to the
kernel source Changes file, this version of mount is new enough.  I see
the BTS (#78735) has this listed as a potato bug, but says it is fixed
in woody.  Do I really need a new mount?  What version?  Do I need to
recompile my current mount with the 2.4.18 kernel header files?  Other?

John