WordPress Modal Media Uploader Not Displaying Properly

In the event the modal window that displays WordPress media uploader stops working properly, displays at the bottom of your content, or is display CDATA text to the screen, it is likely due to another plugin that is wrapping the script in CDATA tags.  Plugins that optimize or minimize javascript are likely the culprit, such as W3 Total Cache.

You can test out which plugin is to blame by disabling and re-enabling the possible plugins.  You can also modify settings, especially those that minify inline javascript.