diff --git a/README.rdoc b/README.rdoc
index 0758ca9ee..2501c3324 100644
--- a/README.rdoc
+++ b/README.rdoc
@@ -28,6 +28,8 @@ If you're using Bundler, ensure the correct load order by not auto-requiring Moc
   require "test/unit"
   require "mocha"
 
+Note that versions 0.10.2 & 0.10.3 included a bug. Please do not use these versions.
+
 Or install the {Rails}[http://www.rubyonrails.org/] plugin...
 
   $ script/plugin install git://github.com/floehopper/mocha.git