diff --git a/doc/tips/downloading_podcasts.mdwn b/doc/tips/downloading_podcasts.mdwn
index e11825420d..2926c67100 100644
--- a/doc/tips/downloading_podcasts.mdwn
+++ b/doc/tips/downloading_podcasts.mdwn
@@ -14,7 +14,9 @@ git-annex will avoid downloading a file from a feed if its url has already
 been stored in the repository before. So once a file is downloaded,
 you can move it around, delete it, `git annex drop` its content, etc,
 and it will not be downloaded again by repeated runs of
-`git annex importfeed`. Just how a podcatcher should behave.
+`git annex importfeed`. Just how a podcatcher should behave.  (git-annex versions 
+since 2015 also tracks the podcast `guid` values, as metadata, to help avoid 
+duplication if the media file url changes; use `git annex metadata ...` to inspect.)
 
 ## templates