I have a assembly (with one component) and a drawing to go along with it in my EPDM vault.  If I open the drawing, the save flag (little asterisk next to the file name in the title bar, pencil icon in the EPDM task pane) does not appear.  If I close the drawing and then open the assembly, the save flag appears.  If I close the assembly, open the drawing and then open the assembly while the drawing is open, no save flag appears.  This behavior makes no sense to me.  If a file is dirty it's dirty.  The order in which it is opened relative to its parent drawing should not be relevant.  If anyone can shed some light on this behavior it would be much appreciated.