diff --git a/Notes b/Notes
index 0967997..316bb30 100644
--- a/Notes
+++ b/Notes
@@ -60,3 +60,6 @@ Tape performance:
     DDS4 (Vendor: HP       Model: C5683A):
 	About 5-6 MB/s for /dev/nst0, @ 64 kB Blocksize. (larger bs makes no
 	difference). File was about 26 MB, 75% compressible with gzip.
+
+Equality checking doesn't work for setuid files.
+