diff --git a/README.md b/README.md
index c01b621bd..22f7e1966 100644
--- a/README.md
+++ b/README.md
@@ -4,6 +4,8 @@ Processing
 This is the official source code for the [Processing](http://processing.org) Development Environment (PDE), 
 the “core” and the libraries that are included with the [download](http://processing.org/download). 
 
+> Development of Processing 3 has started, so major changes are underway inside this repository. **If you need a stable version of the source, use the tag processing-0227-2.2.1.** Do not expect this code to be stable. Major changes include severe things like breaking libraries (due to chaining operations in PVector) or the removal of `Applet` as the base class for PApplet. Some of these will be sorted out before the release, others are simply being tested or are developments that are in-progress.
+
 If you have found a bug in the Processing software, you can file it here under the [“issues” tab](https://github.com/processing/processing/issues). 
 If it relates to the [JavaScript](http://processingjs.org) version, please use [their issue tracker](https://processing-js.lighthouseapp.com/).
 All Android-related development has moved to its own repository [here](https://github.com/processing/processing-android), 
@@ -29,4 +31,4 @@ But in the meantime, I ask for your patience,
 and [patches](https://github.com/processing/processing/pulls).
 
 Ben Fry, 3 February 2013  
-Last updated 21 April 2013
+Last updated 8 June 2014