df on nfs volumes mismatch

[OpenBSD <openbsd_(_at_)_purdue116_(_dot_)_gte_(_dot_)_net>]

With latest GENERIC kernel in -current , I`m still getting nonsensical reports
from df:
Filesystem         1024-blocks  Used Available Capacity Mounted on
10.1.1.20:/export/home                         0 -1504953   278959   123%    /home
10.1.1.20:/export/home/openbsd/usr/src    128469 -1376484   278959   125%    /usr/src
10.1.1.20:/export/home/openbsd/usr/obj    128469 -1376484   278959   125%    /usr/obj

The real numbers are 

dev/dsk/c0t0d0s5    1504953 1225994   128469     91%   /export/home


Help? Clarence