What version of the plugin are you using? Have you tried using the default WordPress theme TwentyTen?
Any word on this? I am having the same issue.
I found a fix here http://www.hackingethics.com/blog/2010/09/04/how-to-enable-featured-image-in-wordpress/. All you have to do is add the following line of code to the theme’s functions.php file:
add_theme_support( ‘post-thumbnails’);
Same problem with no Featured Image metabox for Promotion Slider 3.1.0 running WP 3.0.2 with Coraline theme by Automattic which supports post-thumbnails. Using featured images and post thumbnails successfully with other plugins.
skarjune,
Would you do me a huge favor and disable all your other plugins and see if the featured image metabox appears on the add/edit promotion pages? If it does, re-enable the plugins one at a time and let me know which one(s) were causing the issue.
It seems that everything is in place for the featured image metabox to appear, but there have been a few people having some problems. I suspect it might have to do with a plugin redefining the post thumbnail theme suppport to only work with the post type ‘post’.
Thanks!
Sure Woodent, happy to help.
Meteor Slides seems to be clashing, and it uses a custom post type and featured image, and the developer states in his FAQ:
http://wordpress.org/extend/plugins/meteor-slides/faq/
I have another custom post type that uses featured images, and when I install Meteor Slides, it disables the featured image box in my custom post type, what’s up with that?
Meteor Slides is setup to check for post thumbnail support and create an array with the slides post type and any other post types that are in use. But in order for that to work, your theme or plugin needs to specify any custom post types in an array.
Turns out that the Meteor Slides plugin isn’t using the built in WordPress functions for handling theme support. They are overwriting the value of the $_wp_theme_features[‘post_thumbnails’] variable with an array that only supports ‘post’, ‘page’ and ‘slide’ custom post types. This is what is causing the theme support for the promotions to disappear. They should at least get the existing value and add to it, not reset it.
