I added Johan's badass patch for save a copy with the features I requested.

Now it all works quite well! Great!

(bzr r1630)

1 files changed, 15 insertions, 6 deletions

diff --git a/src/extension/system.cpp b/src/extension/system.cpp
index 3a8a54214..41d6e7513 100644
--- a/src/extension/system.cpp
+++ b/src/extension/system.cpp
@@ -7,6 +7,7 @@
  * Authors:
  *   Ted Gould <ted@gould.cx>
  *
+ * Copyright (C) 2006 Johan Engelen <johan@shouraizou.nl>
  * Copyright (C) 2002-2004 Authors
  *
  * Released under GNU GPL, read the file 'COPYING' for more information
@@ -244,17 +245,25 @@ save(Extension *key, SPDocument *doc, gchar const *filename, bool setextension,
         throw Output::no_overwrite();
     }
 
-    // if 'official' save the filename and extension for future saves.
+    omod->save(doc, fileName);
+
     if (official) {
         // save the filename for next use
         sp_document_set_uri(doc, fileName);
-        // also save the extension for next use
-        Inkscape::XML::Node *repr = sp_document_repr_root(doc);
-        repr->setAttribute("inkscape:output_extension", omod->get_id());
+        gboolean saved = sp_document_get_undo_sensitive(doc);
+            // also save the extension for next use
+            Inkscape::XML::Node *repr = sp_document_repr_root(doc);
+        	sp_document_set_undo_sensitive (doc, FALSE);
+            repr->setAttribute("inkscape:output_extension", omod->get_id());
+            // set the "dataloss" attribute if the chosen extension is lossy
+    	    repr->setAttribute("inkscape:dataloss", NULL);
+            if ( omod->causes_dataloss() ) {
+	            repr->setAttribute("inkscape:dataloss", "true");
+            }
+            repr->setAttribute("sodipodi:modified", NULL);
+    	sp_document_set_undo_sensitive (doc, saved);
     }
     
-    omod->save(doc, fileName);
-
     g_free(fileName);
     return;
 }