README.markdown in slugoid-0.0.5 vs README.markdown in slugoid-0.1.0

- old
+ new

@@ -7,10 +7,18 @@
 
 ## Compatibility
 
 So far it works with the Rails 3 version of Mongoid.
 
+### Attention
+
+If you're using mongoid 2.0.0.rc.7 or less, you need to use version
+*0.0.5*
+
+When mongoid 2.0.0.rc.8 was released there was a change that prevented
+backwards compatibility.
+
 # Installation
 
 ## Rails 3
 
 Include it in your Gemfile:
@@ -88,6 +96,6 @@
 
 # About the Author
 
 [Crowd Interactive](http://www.crowdint.com) is an American web design and development company that happens to work in Colima, Mexico. 
 We specialize in building and growing online retail stores. We don’t work with everyone – just companies we believe in. Call us today to see if there’s a fit.
-Find more info [here](http://www.crowdint.com)!
\ No newline at end of file
+Find more info [here](http://www.crowdint.com)!