Parted 'incompatible feature'

I have a hard drive on this FC1 box that is in bad need of a partition resizing. The partition in question was to have been my FC2 / partition until I decided to wait for FC3. Unfortunately, I had copied a lot of archived files into my FC2 home directory before abandoning FC2. I had a plan that would have resulted in the archived files winding up in their own partition until after I wipe FC2 off the drive.
So, I first checked the drive usage:

[rj@mavis rj]$ df /mnt/hdb
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/hdb2            156436456  31645468 116844436  22% /mnt/hdb
[rj@mavis rj]$ umount /mnt/hdb

And decided to resize hdb2 to 25% of its present size:

[root@mavis root]# parted /dev/hdb
GNU Parted 1.6.3
Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
This program is free software, covered by the GNU General Public License.

This program is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE. See the GNU General Public License for more details.

Using /dev/hdb
Information: The operating system thinks the geometry on /dev/hdb is 19929/255/63.
Therefore, cylinder 1024 ends at 8032.499M.
(parted) p
Disk geometry for /dev/hdb: 0.000-156334.500 megabytes
Disk label type: msdos
Minor Start End Type Filesystem Flags
1 0.031 101.975 primary ext3 boot
2 101.975 155308.073 primary ext3
3 155308.074 156327.824 primary linux-swap
(parted) resize 2 101.975 38903.5
Error: Filesystem has incompatible feature enabled
(parted)

And THAT is where my project stands. I've checked man parted, info parted and the online docs at www.gnu.org/software/parted/manual/html_mono/parted.html#SEC25 and the only restriction I find for resizing ext2/ext3 partitions is that the new start must be the same as the old start.

As can be seen above, parted is ver 1.6.3   Besides that

rj@mavis rj]$ uname -a
Linux mavis 2.4.22-1.2149.nptl #1 Wed Jan 7 12:57:33 EST 2004 i686 athlon i386 GNU/Linux
[rj@mavis rj]$

This is an ASUS A7N8X v2.0 deluxe using onboard IDE

Does anyone have any idea what's going on here?

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