Good catch! I hadn’t tried this on a WordPress site that didn’t have post thumbnails turned on. I’ll fix this and release a new version next week
What version of WordPress are you using? If you’re using a version 2.9 or later you shouldn’t be receiving this error.
The function has_post_thumbnail() exists in WordPress, whether or not you have post thumbnails turned on.
On a clean WordPress installation (3.4) using the TwentyEleven theme, I turned off post thumbnails by removing this line in functions.php:
add_theme_support( ‘post-thumbnails’ );
There are no error messages, even if you include image_size=”thumbnail” in your [displays-posts] shortcode.
Since I can’t reproduce your error, I’m marking this as resolved. If you’re still having the issue I’d be happy to troubleshoot with more information
Thread Starter
jamie
(@majamusan)
would of been 3.2 i think but have stopped development on that site for now
