diff -p -up freebirth-0.3.2/fuse_loops.c.strfmt freebirth-0.3.2/fuse_loops.c
--- freebirth-0.3.2/fuse_loops.c.strfmt	1999-02-27 03:02:23.000000000 +0100
+++ freebirth-0.3.2/fuse_loops.c	2009-12-07 20:15:56.000000000 +0100
@@ -63,7 +63,7 @@ void expand(sample_producer *node, char 
   for (; *tmpl; tmpl++) {
     char buf[1024];
     char *sp = *tmpl, *dp = buf;
-    dp += sprintf(dp, prefix);
+    dp += sprintf(dp, "%s", prefix);
 
     while (*sp) {
       if (*sp == '$') {
@@ -107,7 +107,7 @@ void expand(sample_producer *node, char 
     }
     *dp++ = '\n';
     *dp = '\0';
-    fprintf(file, buf);
+    fputs(buf, file);
   }
 }