diff --git a/README.md b/README.md
index 75f80e4..2c3e861 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,10 @@
+(N.B. the way that Docker handles permissions may vary depending on your current Docker version. If you're getting errors like
+```
+dial unix /var/run/docker.sock: permission denied
+```
+when you run the below commands, simply use use sudo. This is a [known issue](https://twitter.com/docker/status/366040073793323008).)
+
+
 This repo contains a recipe for making a [Docker](http://docker.io) container, with Apache, MySQL and PHP.
 To build, make sure you have Docker [installed](http://www.docker.io/gettingstarted/), clone this repo somewhere, and then run:
 ```