There is a known bug in the latest version of WP-prettyPhoto that basically prevents it to work as intended. While you wait for an official fix, which will come soon, here is what you can do to make it work:

1. First, identify the problem. Look at the source code of your page, within the prettyPhoto javascript stub, there is a value called “autoplay”. If that is not set to true or false, you have the bug.
2. In your admin options, deactivate the plugin then reactivate it.
3. Go in the WP-prettyPhoto options and change the value of “autoplay”, you can change it back later.
4. Look at your source again, “autoplay” should be set and your pictures/videos should pop up nicely.

Thanks to Brad Keeling who reported the bug to me (as opposed to bitching on twelve different forums) and confirmed the fix.

Lots has changed since the last article I made about WP-prettyPhoto usage, and so it is time to revamp the instructions, explain new features and hopefully be a bit more thorough. First off, let me first mention the following thing:  prettyPhoto is written by Stéphane Caron. Here are some related links to avoid repeating them throughout this article: Stéphane’s blog, prettyPhoto’s project page, prettyPhoto on GitHub, Stéphane on Twitter, WP-prettyPhoto at WordPress Extend, WP-prettyPhoto Support Forum.

Revision History: This article is intended to document the current WP-prettyPhoto (1.5.1) & prettyPhoto (2.5.2) versions.
more…

It’s been a while since any activity has happened with prettyPhoto and WP-prettyPhoto. I was waiting for some changes to the prettyPhoto code to release a new version, and Stéphane Caron has released version 2.3 of his prettyPhoto jQuery plugin recently, so it was time to roll out a new WP-prettyPhoto version, 1.2, with all the changes and features that have been suggested since the last release. To skip the blah blah and go straight to downloading, head over to WordPress Extend. more…

WP-prettyPhoto allows you to use prettyPhoto by Stéphane Caron, a themeable jQuery-powered Lightbox clone with WordPress. Check it out on WordPress Extend!