Hello Thomas,
the problem appears after sending a link. Say I create a Word doc in MOSS and save it there in a Shared Doc area. Then I use the drop down menu to email a link to this doc to you. If you click then on the link in your email the browser opens and not the Word application. You can view the doc, you can make changes but you can´t save the changes unless you use the "sav under" command but then you have to know the complete path to your Teamsite because default storage point is then "own files".
Thanks
Marc