error while creating logical partition

Binary package hint: gnome-disk-utility

Running Maverick release candidate, with all the updates applied since final release (which happened two weeks ago).

Ran palimpsest to add partitions to an empty SATA drive, in preparation for from-scratch installation of Maverick final.

To reproduce:

Start with empty 500GB drive.

Add three empty primary partitions: 1GB, 189GB, 20GB. Then add an extended partition, using all remaining space.

Add one empty 20GB logical partition within the extended.

Error reported:

Error creating partition

An error occurred while performing an operation on "500 GB Hard Disk" (ATA Hitachi HTS545050B9A300): The operation failed

Details:

Error creating partition: helper exited with exit code 1: In part_add_partition: device_file=/dev/sde, start=210007848960, size=20000000000, type=0x83
Entering MS-DOS parser (offset=0, size=500107862016)
MSDOS_MAGIC found
looking at part 0 (offset 32256, size 1003451904, type 0x83)
new part entry
looking at part 1 (offset 1003484160, size 189000483840, type 0x83)
new part entry
looking at part 2 (offset 190003968000, size 20003880960, type 0x83)
new part entry
looking at part 3 (offset 210007848960, size 290097400320, type 0x05)
Entering MS-DOS extended parser (offset=210007848960, size=290097400320)
readfrom = 210007848960
MSDOS_MAGIC found
Exiting MS-DOS extended parser
Exiting MS-DOS parser
MSDOS partition table detected
containing partition table scheme = 1
got it
got disk
new partition
added partition start=210007881216 size=20003848704
committed to disk
Error doing BLKPG ioctl with BLKPG_ADD_PARTITION for partition 5 of size 210007881216 at offset 20003848704 on /dev/sde: Device or resource busy

....Note that I also tried this with a different 500GB drive, made by a different company, and got the same result.

I see that there are other bugs filed against Lucid that seem to afflict 500GB drives but not other commonly used sizes. I was under the impression that these bugs had been fixed by the time Maverick release candidate appeared, but perhaps all of them weren't, or perhaps this is unrelated.

ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: gnome-disk-utility 2.30.1-2
ProcVersionSignature: Ubuntu 2.6.35-22.35-generic-pae 2.6.35.4
Uname: Linux 2.6.35-22-generic-pae i686
Architecture: i386
Date: Sun Oct 24 13:19:47 2010
ExecutablePath: /usr/bin/palimpsest
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release Candidate i386 (20100928)
ProcEnviron:
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: gnome-disk-utility
XsessionErrors:
 (polkit-gnome-authentication-agent-1:1756): GLib-CRITICAL **: g_once_init_leave: assertion `initialization_value != 0' failed
 (nautilus:1751): GConf-CRITICAL **: gconf_value_free: assertion `value != NULL' failed