DPM 2007 Agent failing to protect Windows Vista SP1

I recently modifed my DPM 2007 installation to backup my local users folder on Windows Vista Ultimate x64. This would not work and kept producing the following event logs when I attemted to manually sync the share:

Log Name:      Application
Source:        Application Error
Date:          15/06/2008 08:50:37
Event ID:      1000
Task Category: (100)
Level:         Error
Keywords:      Classic
User:          N/A
Computer:      Cartman2.thefoleyhouse.co.uk
Description:
Faulting application DPMRA.exe, version 2.0.5820.0, time stamp 0x46f990f7, faulting module kernel32.dll, version 6.0.6001.18000, time stamp 0x4791ada5, exception code 0x80070002, fault offset 0x000000000002649d, process id 0x1ff8, application start time 0x01c8cebaac1ac7c8.

After some research I found the following fix:
http://www.eggheadcafe.com/software/aspnet/31450629/cant-create-recovery-poi.aspx

You have to create the following DWORD registry key with a value of 1:
HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\kernel\obcaseinsensitive