Reproduce (I hope):
# cat /dev/zero >/dev/hda2 # to be safe
# mkfs.xfs /dev/hda2
# echo "cat (hd0,1)/" | grub --batch
Segmentation fault

Cause:
Note the following liens in grub-0.96/stage2/fsys_xfs.c:
337: static char *usual[2] = {".", ".."};
339: char *name = usual[0];
405: name[namelen] = 0;

In case icore.di_format is XFS_DINODE_FMT_LOCAL, this means we write to a read-only string. The following change in the GRUB CVS looks good to fix it:
http://cvs.savannah.gnu.org/viewcvs/grub/stage2/fsys_xfs.c?r1=1.4&r2=1.5&root=grub

2005-05-08  Yoshinori K. Okuji  <okuji@enbug.org>

  * stage2/fsys_xfs.c (next_dentry): Use arrays of arrays instead of
  arrays of pointers for USUAL, to avoid read-only strings. Reported
  by Sven Wegener <swegener@gentoo.org>.

Confirmed: No crash in GRUB 0.97.