Firefox 0.9, Outlook 2000 and the "Locate Link Browser" dialogue

Had an issue where links clicked on in emails were launching in Firefox (as expected) but were also throwing up a "Locate Link Browser" dialogue box, which was asking me to select the program to launch the URL with. I selected Firefox (logical I hear you say....)

Now I had 2 windows opening each time I clicked on a URL in an email.

Solution?

Easy:
From a file browser window click Tools > Options, File Types Tab.
Select the "(NONE) URL:HyperText Transfer Protocol" entry
Select the "open" option and click "Edit"
Clear out the "DDE Application Not Running" field.
Click OK
Click "Set Default"

Problem resolved.