diff -r 3bb3ec5c0696 java.source/src/org/netbeans/modules/java/source/save/CasualDiff.java
--- a/java.source/src/org/netbeans/modules/java/source/save/CasualDiff.java	Thu Jun 04 00:47:41 2009 +0200
+++ b/java.source/src/org/netbeans/modules/java/source/save/CasualDiff.java	Sat Jun 06 23:24:12 2009 +0100
@@ -1060,24 +1060,42 @@
         int localPointer = bounds[0];
         if (nameChanged(oldT.label, newT.label)) {
             copyTo(localPointer, localPointer = getOldPos(oldT));
-            printer.print("break ");
-            printer.print(newT.label);
-            localPointer += 6 + oldT.label.length();
+            printer.print("break");
+            localPointer += 5;
+            if (oldT.label != null && oldT.label.length() > 0) {
+                // XXX could be arbitrary whitespace
+                localPointer += 1;
+            }
+            if (newT.label != null && newT.label.length() > 0) {
+                printer.print(" ");
+                printer.print(newT.label);
+            }
+            if (oldT.label != null)
+                localPointer += oldT.label.length();
         }
         copyTo(localPointer, bounds[1]);
         return bounds[1];
     }
 
     protected int diffContinue(JCContinue oldT, JCContinue newT, int[] bounds) {
+        // XXX code repetition with diffBreak
         int localPointer = bounds[0];
         if (nameChanged(oldT.label, newT.label)) {
             copyTo(localPointer, localPointer = getOldPos(oldT));
-            printer.print("continue ");
-            printer.print(newT.label);
-            localPointer += 9 + oldT.label.length();
+            printer.print("continue");
+            localPointer += 8;
+            if (oldT.label != null && oldT.label.length() > 0) {
+                // XXX could be arbitrary whitespace
+                localPointer += 1;
+            }
+            if (newT.label != null && newT.label.length() > 0) {
+                printer.print(" ");
+                printer.print(newT.label);
+            }
+            if (oldT.label != null)
+                localPointer += oldT.label.length();
         }
         copyTo(localPointer, bounds[1]);
-
         return bounds[1];
     }