docs: add caution about adt in eclipse 3.6

Change-Id: I37c920f6a5290d891c4a6dea5978147a50eec807
diff --git a/docs/html/sdk/eclipse-adt.jd b/docs/html/sdk/eclipse-adt.jd
index f5558ab..1a42e7f 100644
--- a/docs/html/sdk/eclipse-adt.jd
+++ b/docs/html/sdk/eclipse-adt.jd
@@ -48,6 +48,9 @@
 how to update ADT to the latest version or how to uninstall it, if necessary.
 </p>
 
+<p class="caution"><strong>Caution:</strong> There are known issues with the ADT plugin running with
+Eclipse 3.6. Please stay on 3.5 until further notice.</p>
+
 <h2 id="notes">Revisions</h2>
 
 <p>The sections below provide notes about successive releases of