--- a/mod_presence_cache/README.markdown	Thu Dec 10 16:31:58 2015 +0100
+++ b/mod_presence_cache/README.markdown	Thu Dec 10 17:13:12 2015 +0100
@@ -14,7 +14,8 @@
 replies to presence probes. Also see [mod\_throttle\_presence].
 
 By default, only binary (online or offline) state is stored. It can
-optionally store the full presence but this requires much more memory.
+optionally store the full presence but this requires much more memory
+and bandwidth.
 
 Configuration
 =============
@@ -29,10 +30,13 @@
 Advanced configuration
 ======================
 
-To enable full stanza caching:
+To enable *experimental* full stanza caching:
 
     presence_cache_full = false
 
+This will usually double the presence data sent to clients, pending
+support for deduplication.
+
 TODO
 ====