gnome-disk-utility won't let you select certain partitions

[Michael DePaulo]

I recently pulled a 2GB microSD card with a complex MBR partition table out of my Chumby One (an embedded device), and put it into a USB 2.0 SD card reader on my Ubuntu 12.04 AMD64 desktop/server. When I view the disk/reader in gnome-disk-utlity, it won't let me click on certain partitions. There are also 2 other issues:
1. It Splits free space into 2 adjacent sections of free space.
2. Reports the first free space section (the last "partition" I can click on) as having a capacity of 18446744 TB (-134,217,728 bytes)

The screenshot I will attach demonstrates this. I have the last "partition" I can click on selected. Specifically, I can select only the 3 primary partitions at the beginning of the drive and the first section of free space.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: gnome-disk-utility 3.0.2-2ubuntu7
ProcVersionSignature: Ubuntu 3.2.0-24.37-generic 3.2.14
Uname: Linux 3.2.0-24-generic x86_64
ApportVersion: 2.0.1-0ubuntu7
Architecture: amd64
Date: Wed May 16 18:08:59 2012
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100429)
ProcEnviron:
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: gnome-disk-utility
UpgradeStatus: Upgraded to precise on 2012-05-02 (13 days ago)

[Michael DePaulo (mikedep333)]

I can only click on this section of free space and the 3 primary partitions before it.