diff --git a/doc/plugins/trail/discussion.mdwn b/doc/plugins/trail/discussion.mdwn
index ac07f8640..d37e5f7f9 100644
--- a/doc/plugins/trail/discussion.mdwn
+++ b/doc/plugins/trail/discussion.mdwn
@@ -137,3 +137,18 @@ My setup and test may very well have mistakes but perhaps someone using the trai
 I have removed a similar comment from the album discussion.
 
  --[[kjs]]
+
+> I would expect changing imgE.mdwn to rebuild album03.mdwn (because album03
+> inlines imgE) and vice versa (because imgE uses album03's \[[!meta title]]).
+>
+> I would not expect changing imgE.mdwn or album03.mdwn to affect album02
+> or imgC.
+>
+> I would also not expect changing index.mdwn to rebuild anything else
+> unless there is a valid dependency reason to do so.
+>
+> Can you reproduce this problem in a wiki that does not contain anything
+> private, and publish its git repo somewhere? (I realise photo galleries
+> tend to be more personal/private than typical wikis, so you don't
+> necessarily want to link the real thing - that's why my album demos
+> tend to use dummy data). --[[smcv]]