Ubuntu 11.10 installer crashed during side-by-side installation with Win7 SP1

[Abbot Moffat]

This is my second 11.10 32-bit installation failure. The first attempt was the "Install from Windows" option, which appeared to succeed and ran successfully (with no reboot) after installation; but then failed to boot after a restart. I uninstalled using the Windows program uninstaller in Control Panel.
     This second attempt was a manual "side-by-side" installation. I created two free logical drives: 40 GB for swap and 98 GB for system/root. The installer crashed. At this point I am assuming that Ubuntu is unhappy with the size of the pointer to the start sector for the boot loader. The hard disk system on this i5 computer is a 1.3 TB RAID 1 (hardware controller on MB) and the logical drive I selected for both installations was towards the end of the drive. I suppose it might be an incompatibility with the RAID controller as well, but I would think that unlikely. I'll see if I can move stuff around and successfully install closer to the start of the RAID array. The attachment box below only lets me attach a single file, so went with the partman log, as I suspect that's where the issue is. I'm not sure I'll be able to get at the syslog file after this current session ends, but I'll try to save it. Feel free to email me at <email address hidden> if you need further information. Thx.

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: ubiquity 2.8.7
ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4
Uname: Linux 3.0.0-12-generic i686
ApportVersion: 1.23-0ubuntu3
Architecture: i386
CasperVersion: 1.287
Date: Wed Oct 19 10:13:49 2011
LiveMediaBuild: Ubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111012)
ProcEnviron:
 LANGUAGE=
 PATH=(custom, no user)
 LANG=en_US.UTF-8
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

[Ubuntu Foundations Team Bug Bot (crichton)]

Exception during installation:
Oct 19 10:13:32 ubuntu plugininstall.py: Traceback (most recent call last):
Oct 19 10:13:32 ubuntu plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 1641, in <module>
Oct 19 10:13:32 ubuntu plugininstall.py: install.run()
Oct 19 10:13:32 ubuntu plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 55, in wrapper
Oct 19 10:13:32 ubuntu plugininstall.py: func(self)
Oct 19 10:13:32 ubuntu plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 199, in run
Oct 19 10:13:32 ubuntu plugininstall.py: self.configure_bootloader()
Oct 19 10:13:32 ubuntu plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 955, in configure_bootloader
Oct 19 10:13:32 ubuntu plugininstall.py: "GrubInstaller failed with code %d" % ret)
Oct 19 10:13:32 ubuntu plugininstall.py: InstallStepError: GrubInstaller failed with code 1
Oct 19 10:13:32 ubuntu plugininstall.py: