Brad, Ozh, and Justin,
Thank you for writing this book! It's already become a very valuable resource that I have no idea how I worked without it.

I'm having an issue with Polling an alternative API for my plugin. The code works and can tell when a new update is available, and it is able to grab and install the newer version just fine. My issue is WP keeps telling me that I have a new version available, even when I've already downloaded the recent one.

The version numbers match, the dates are in the past, and I've combed through the code; I just cant figure out whats not getting communicated to stop WordPress from telling me I have a new version available.

Thank you for your time.

I've gotten all the way up until mgyura

any additional info on this?

score! the issue lies when checking the transient and response. You shouldn't add to the transient array if the new_version matches the checked version, e.g.

if( false !== $response && $response->new_version > $transient->checked[EMP_SLUG] ) {

by the way, forgot to say how good this book is. Whilst I've had to learn most of this the hard way over the years there's still golden nuggets even in chapter 1!

This is exactly what I was looking for. Works great! Thank you for posting this.