Is this a custom post type? I had the same issue but am using a custom post type.
I solved it by changing this:
echo wpautop($sg->post_content);
To:
echo do_shortcode(wpautop($sg->post_content));
However, I do still have the issue that slideshow_link_text=”[Show slideshow]” shows up and the closing ] makes it stop short. I can take it out, but it’s a manual thing, even though I’ve turned off the slideshow link, it still inserts that text in there each time.
Hope this helps!
