Greg and I began testing VISTA with non-privileged logons, and discovered a bug either in VISTA or in IMT, which presumably affects other apps too. When you try to save a file to a location where you don't have write permissions, the save operation fails silently; no error message comes back. The Modified setting remains true, so you can't close the document without being prompted; nevertheless, this is a serious issue. Look into this and make sure the apps show an appropriate error message when a save fails due to lack of privilege on VISTA.