diff --git a/sepolgen/HACKING b/sepolgen/HACKING
index 5cdf6d5..a0ec323 100644
--- a/sepolgen/HACKING
+++ b/sepolgen/HACKING
@@ -76,4 +76,4 @@ information about the object classes - including information flow. It
 is separated to keep the core from being concerned about the details
 of the object classes.
 
-[selist]: http://www.nsa.gov/selinux/info/list.cfm
\ No newline at end of file
+[selist]: http://www.nsa.gov/research/selinux/info/list.cfm
diff --git a/sepolgen/src/sepolgen/audit.py b/sepolgen/src/sepolgen/audit.py
index 9fdfafa..9e2ccee 100644
--- a/sepolgen/src/sepolgen/audit.py
+++ b/sepolgen/src/sepolgen/audit.py
@@ -20,6 +20,7 @@
 import refpolicy
 import access
 import re
+import sys
 
 # Convenience functions
 
@@ -343,6 +344,7 @@ class AuditParser:
         self.policy_load_msgs = []
         self.path_msgs = []
         self.by_header = { }
+        self.check_input_file = False
                 
     # Low-level parsing function - tries to determine if this audit
     # message is an SELinux related message and then parses it into
@@ -378,6 +380,7 @@ class AuditParser:
                 found = True
                 
             if found:
+                self.check_input_file = True
                 try:
                     msg.from_split_string(rec)
                 except ValueError:
@@ -447,6 +450,9 @@ class AuditParser:
         while line:
             self.__parse(line)
             line = input.readline()
+        if not self.check_input_file:
+            sys.stderr.write("Nothing to do\n")
+            sys.exit(0)
         self.__post_process()
 
     def parse_string(self, input):
diff --git a/sepolgen/src/sepolgen/matching.py b/sepolgen/src/sepolgen/matching.py
index 1a9a3e5..d56dd92 100644
--- a/sepolgen/src/sepolgen/matching.py
+++ b/sepolgen/src/sepolgen/matching.py
@@ -50,7 +50,7 @@ class Match:
                 return 1
 
 class MatchList:
-    DEFAULT_THRESHOLD = 120
+    DEFAULT_THRESHOLD = 150
     def __init__(self):
         # Match objects that pass the threshold
         self.children = []
@@ -63,14 +63,15 @@ class MatchList:
     def best(self):
         if len(self.children):
             return self.children[0]
-        else:
-            return None
+        if len(self.bastards):
+            return self.bastards[0]
+        return None
 
     def __len__(self):
         # Only return the length of the matches so
         # that this can be used to test if there is
         # a match.
-        return len(self.children)
+        return len(self.children) + len(self.bastards)
 
     def __iter__(self):
         return iter(self.children)
diff --git a/sepolgen/src/sepolgen/yacc.py b/sepolgen/src/sepolgen/yacc.py
index 2f3c09d..bc4536d 100644
--- a/sepolgen/src/sepolgen/yacc.py
+++ b/sepolgen/src/sepolgen/yacc.py
@@ -506,7 +506,7 @@ def initialize_vars():
 
     Errorfunc    = None    # User defined error handler
 
-    Signature    = hashlib.md5()   # Digital signature of the grammar rules, precedence
+    Signature    = hashlib.sha256()   # Digital signature of the grammar rules, precedence
                                # and other information.  Used to determined when a
                                # parsing table needs to be regenerated.