Matt Martz

achmafooma

Moves the gallery shortcode styles to the head so it doesn’t break XHTML 
validation; allows disabling or modifying the default gallery styles.
By default when using the WordPress gallery, the styles are placed into the 
post content which breaks XHTML validation. This plugin moves the style into 
the head of the page using a look-ahead to determine if the [gallery] 
shortcode is used in any posts.
This plugin also gives you the option to modify the default gallery style 
CSS or disable the gallery styles entirely (so you can control it from your 
template CSS files).
This plugin uses ideas recommended in a patch located at 
https://trac.wordpress.org/attachment/ticket/6380/6380-style.diff
Special thanks to 
* The original author: Matt Martz, http://sivel.net 
* Serbo-Croatian (sr_RS) translation: Borisa Djuraskovic, http://www.webhostinghub.com 
* Spanish (es_ES) translation: Ogi Djuraskovic, http://www.webhostinghub.com/

Gallery Shortcode Style to Head

Moves the gallery shortcode styles to the head so it doesn't break XHTML validation; allows disabling or modifying the default gallery styles.

mondalaci

Have you ever tried to validate a WordPress page that is full of Flash content and experienced some major pain throughout the process? If so, then this plugin is just for you!
Ultimate Flash XMTMLizer turns Flash embed code into well-formed XHTML by escaping object tags on the server side and unescaping them on the client side using JavaScript.

Ultimate Flash XHTMLizer

Turns Flash embed code into well-formed XHTML by escaping object tags on the server side and unescaping them on the client side using JavaScript.

Gallery Shortcode Style to Head vs Ultimate Flash XHTMLizer