diff -Nurd -x'*~' xdiskusage-1.48.orig/xdiskusage.C xdiskusage-1.48/xdiskusage.C
--- xdiskusage-1.48.orig/xdiskusage.C	2004-09-21 01:23:14.000000000 -0400
+++ xdiskusage-1.48/xdiskusage.C	2011-05-15 15:10:21.000000000 -0400
@@ -392,16 +392,16 @@
       strncpy(pathbuf, path, 1024);
       for (int i=0; i<10; i++) {
 	char *p = (char*)fl_filename_name(pathbuf);
-	int i = readlink(pathbuf, p, 1024-(p-pathbuf));
+	int pathlen = readlink(pathbuf, p, 1024-(p-pathbuf));
 	if (i < 0) {
 	  if (errno != EINVAL) {
 	    strcat(pathbuf, ": no such file");
-	    fl_alert(pathbuf);
+	    fl_alert("%s", pathbuf);
 	    return 0;
 	  }
 	  break;
 	}
-	if (*p == '/') {memmove(pathbuf, p, i); p = pathbuf;}
+	if (*p == '/') {memmove(pathbuf, p, pathlen); p = pathbuf;}
 	p[i] = 0;
 	path = pathbuf;
       }
@@ -492,7 +492,7 @@
     size_t len = strlen (buffer);
     if (buffer[len-1] != '\n')
       {
-	fprintf (stderr, "%s:%d: line too long, skipping it\n", path, line_no);
+	fprintf (stderr, "%s:%lu: line too long, skipping it\n", path, line_no);
 	// Read until end of line or EOF.
 	while (1)
 	  {
@@ -510,7 +510,7 @@
     ulong size = strtoul(buffer, &p, 10);
     if (!isspace(*p) || p == buffer) {
       if (!*p || *p=='#') continue; // ignore blank lines or comments (?)
-      fl_alert("%s:%d: does not look like du output: %s", path, line_no, p);
+      fl_alert("%s:%lu: does not look like du output: %s", path, line_no, p);
       cancelled = 1;
       continue;
     }