diff -r 5bab2e971333 -r 2c0a2766461c src/de/uapcore/sudoku/DocumentHandler.java
--- a/src/de/uapcore/sudoku/DocumentHandler.java	Sun Jan 27 15:03:57 2013 +0100
+++ b/src/de/uapcore/sudoku/DocumentHandler.java	Thu Jan 31 18:44:44 2013 +0100
@@ -76,6 +76,7 @@
                 throw new IOException("Kein Sudoku-Feld enthalten!");
             }
         }
+        field.setAllCellsModified(false);
     }
     
     public void save(Field field) throws IOException {