diff --git a/index.html.markdown b/index.html.markdown
index 73807c12..9a1f4abe 100644
--- a/index.html.markdown
+++ b/index.html.markdown
@@ -16,6 +16,12 @@ API hosts.
 
 Use the navigation to the left to read about the available resources.
 
+<div class="alert alert-block alert-info">
+<strong>Note:</strong> The Docker provider is new as of Terraform 0.4.
+It is ready to be used but many features are still being added. If there
+is a Docker feature missing, please report it in the GitHub repo.
+</div>
+
 ## Example Usage
 
 ```