I have imported the settings from my computer which states the following:

HTML Editor: Not configured
E-Mail: Lotus Notes
Newsgroups: Lotus Notes
Internet Call: Microsoft NetMeeting
Calendar: Lotus Notes
Contact List: Lotus Notes

It seems that whenever there is an update to IE be it security, or rollup that all clients are reset to the defaults (Word, Outlook etc).

Not sure why when the GPO stays the same, I can understand a brief period where these settings may be changed, but they should be reset pretty quickly by the GPO, other settings in the same GPO are being applied correctly.

Any ideas?