diff -urp john-1.7.6-jumbo-5/src/hmacMD5_fmt.c john-1.7.6/src/hmacMD5_fmt.c
--- john-1.7.6-jumbo-5/src/hmacMD5_fmt.c	2009-10-29 04:44:13 +0000
+++ john-1.7.6/src/hmacMD5_fmt.c	2010-07-27 19:30:27 +0000
@@ -127,6 +127,17 @@ static void hmacmd5_set_salt(void *salt)
 	cursalt[GETPOS(total_len, 2)] = 0x80;
 	cursalt[GETPOS(total_len, 3)] = 0x80;
 #endif
+	{
+		int i;
+		for (i = total_len + 1; i < SALT_SIZE; i++) {
+			cursalt[GETPOS(i, 0)] = 0;
+			cursalt[GETPOS(i, 1)] = 0;
+#if (MMX_COEF == 4)
+			cursalt[GETPOS(i, 2)] = 0;
+			cursalt[GETPOS(i, 3)] = 0;
+#endif
+		}
+	}
 	//total_len += 64;
 	//total_len += (total_len<<16);
 #else
diff -urp john-1.7.6-jumbo-5/src/params.h john-1.7.6/src/params.h
--- john-1.7.6-jumbo-5/src/params.h	2010-07-15 05:37:41 +0000
+++ john-1.7.6/src/params.h	2010-07-27 19:43:35 +0000
@@ -17,7 +17,7 @@
 /*
  * John's version number.
  */
-#define JOHN_VERSION			"1.7.6-jumbo-5"
+#define JOHN_VERSION			"1.7.6-jumbo-6"
 
 /*
  * Notes to packagers of John for *BSD "ports", Linux distributions, etc.: