=== modified file 'src/file.cpp'
--- src/file.cpp	2011-03-14 19:50:25 +0000
+++ src/file.cpp	2011-04-24 07:52:23 +0000
@@ -830,6 +830,15 @@
         else
             g_warning( "Error converting save filename to UTF-8." );
 
+
+        Inkscape::Extension::Output *omod;
+        omod = dynamic_cast<Inkscape::Extension::Output *>(selectionType);
+        Glib::ustring save_extension = (std::string)omod->get_extension();
+
+        if (!hasEnding(fileName, save_extension.c_str() ))
+        	fileName += save_extension.c_str();
+
+
         // FIXME: does the argument !is_copy really convey the correct meaning here?
         success = file_save(parentWindow, doc, fileName, selectionType, TRUE, !is_copy, save_method);
 
@@ -847,6 +856,18 @@
     return false;
 }
 
+/**
+ * Check if a string ends with another string.
+ */
+bool hasEnding (Glib::ustring const &fullString, Glib::ustring const &ending)
+{
+    if (fullString.length() > ending.length()) {
+        return (0 == fullString.compare (fullString.length() - ending.length(), ending.length(), ending));
+    } else {
+        return false;
+    }
+}
+
 
 /**
  * Save a document, displaying a SaveAs dialog if necessary.

=== modified file 'src/file.h'
--- src/file.h	2009-09-27 21:36:48 +0000
+++ src/file.h	2011-04-24 06:07:38 +0000
@@ -115,6 +115,10 @@
 /* Do the saveas dialog with a document as the parameter */
 bool sp_file_save_dialog (Gtk::Window &parentWindow, SPDocument *doc, Inkscape::Extension::FileSaveMethod save_method);
 
+/**
+ * Check if a string ends with another string.
+ */
+bool hasEnding (Glib::ustring const &fullString, Glib::ustring const &ending);
 
 /*######################
 ## I M P O R T