diff -Naur -x '*~' btparse-0.35/progs/bibparse.c btparse-0.35-fix-format-errors/progs/bibparse.c
--- btparse-0.35/progs/bibparse.c	2005-04-04 20:54:55.000000000 +0200
+++ btparse-0.35-fix-format-errors/progs/bibparse.c	2009-09-13 16:09:46.000000000 +0200
@@ -299,8 +299,8 @@
    }
    else
    {
-      fprintf (stderr, Usage);
-      fprintf (stderr, Help);
+      fprintf (stderr, "%s", Usage);
+      fprintf (stderr, "%s", Help);
       fprintf (stderr, "Not enough arguments\n");
       exit (1);
    }
diff -Naur -x '*~' btparse-0.35/progs/dumpnames.c btparse-0.35-fix-format-errors/progs/dumpnames.c
--- btparse-0.35/progs/dumpnames.c	2005-04-04 20:54:55.000000000 +0200
+++ btparse-0.35-fix-format-errors/progs/dumpnames.c	2009-09-13 16:08:45.000000000 +0200
@@ -139,7 +139,7 @@
    
    if (argc != 2) 
    {
-      fprintf (stderr, Usage);
+      fprintf (stderr, "%s", Usage);
       fprintf (stderr, "Wrong number of arguments\n");
       exit (1);
    }
diff -Naur -x '*~' btparse-0.35/src/bibtex_ast.c btparse-0.35-fix-format-errors/src/bibtex_ast.c
--- btparse-0.35/src/bibtex_ast.c	2005-04-04 20:54:54.000000000 +0200
+++ btparse-0.35-fix-format-errors/src/bibtex_ast.c	2009-09-13 16:04:51.000000000 +0200
@@ -57,7 +57,7 @@
 void dump_ast (char *msg, AST *root)
 {
    if (msg != NULL)
-      printf (msg);
+      printf ("%s", msg);
    dump (root, 0);
    printf ("\n");
 }
diff -Naur -x '*~' btparse-0.35/src/error.c btparse-0.35-fix-format-errors/src/error.c
--- btparse-0.35/src/error.c	2005-04-04 20:54:54.000000000 +0200
+++ btparse-0.35-fix-format-errors/src/error.c	2009-09-13 16:03:31.000000000 +0200
@@ -88,7 +88,7 @@
 
    if (err->filename)
    {
-      fprintf (stderr, err->filename);
+      fprintf (stderr, "%s", err->filename);
       something_printed = TRUE;
    }
    if (err->line > 0)                   /* going to print a line number? */
@@ -111,7 +111,7 @@
    {
       if (something_printed)
          fprintf (stderr, ", ");
-      fprintf (stderr, name);
+      fprintf (stderr, "%s", name);
       something_printed = TRUE;
    }