diff --git a/src/libs/common/config_os.h b/src/libs/common/config_os.h
index edf86eb4..f4595371 100644
--- a/src/libs/common/config_os.h
+++ b/src/libs/common/config_os.h
@@ -2,7 +2,7 @@
 #define CONFIG_OS_H_
 
 
-#define PESTPP_VERSION "5.2.8";
+#define PESTPP_VERSION "5.2.9";
 
 #if defined(_WIN32) || defined(_WIN64)
 #define OS_WIN
diff --git a/src/libs/pestpp_common/EnsembleMethodUtils.cpp b/src/libs/pestpp_common/EnsembleMethodUtils.cpp
index f35d6725..28f70737 100644
--- a/src/libs/pestpp_common/EnsembleMethodUtils.cpp
+++ b/src/libs/pestpp_common/EnsembleMethodUtils.cpp
@@ -4994,6 +4994,10 @@ void EnsembleMethod::sanity_checks()
     {
         errors.push_back("multimodal alpha < 0.001");
     }
+    if (ppo->get_ies_n_iter_mean() > 0)
+    {
+        warnings.push_back("mean-shifting iterations is a new concept and subject to change - experimental at best");
+    }
 
     if (warnings.size() > 0)
     {