diff --git a/src/calibre/db/__init__.py b/src/calibre/db/__init__.py
index eded760cde..781e886567 100644
--- a/src/calibre/db/__init__.py
+++ b/src/calibre/db/__init__.py
@@ -114,4 +114,7 @@ Various things that require other things before they can be migrated:
     3. From refresh in the legacy interface: Rember to flush the composite
     column template cache.
     4. Replace the metadatabackup thread with the new implementation when using the new backend.
+    5. In the new API refresh() does not re-read from disk. That might break a
+    few things, for example content server reloading on db change as well as
+    dump/restore of db?
 '''