GPMC - Error Generating HTML Report

I have encountered this several times when editing a GPO for a Windows 2003 R2 domain.

Specifically when changing intranet trusted zone settings in: User Configuration -> Windows Settings -> Internet Explorer Maintenance -> Security

To fix this, I used this suggestion - http://groups.google.com/group/microsoft.public.windows.group_policy/browse_thread/thread/fd709e5f8eaee318/e239e8c95f7b4039

Edit install.ins inside: {GUID of Policy}\User\MICROSOFT\IEAK

[Security Imports]

ImportSecZones=1

Set back to "0"