Fatal Error failure when uploading image to Multisite enabled instance

[pypo]

When trying to upload an image, the following error is thrown:

[quote]Fatal error: Call to undefined function get_post_thumbnail_id() in /home/mysite/public_html/wp-admin/includes/media.php on line 1292quote

Using: Version 3.0-RC2-15136 (also failure in subsequent BE releases)

Multisite enabled.

[ryan]

What theme are you using. It sounds like the theme is calling add_theme_support('post-thumbnails') on the init action instead of either immediately upon loading functions.php or on the after_setup_theme action.

[ryan]

Closing since this seems to be a theme problem. Re-open if the problem persists after verifying that the theme is calling add_theme_support() correctly.