[root@solaris nameserve]# df -k /nameserve
Filesystem kbytes used avail capacity Mounted on
/dev/dsk/c0d1s0 10324476 344342 9876890 4% /nameserve

So it is currently using 326ish megs. However the agentd is reporting back this in the log:

8978:20081016:151053 Requested [vfs.fs.size[/nameserve,used]]
8978:20081016:151053 Sending back [440914]

which makes the front end say it is using 432 MB.

The item looks like:
vfs.fs.size[/nameserve,used]
unit: B
custom multiplier: 1024