I just installed WP Open Graph on http://www.partiallyexaminedlife.com and it seems to be inconsistent about setting the site-wide og:image tag. I have it set to be http://www.partiallyexaminedlife.com/PEL_300x300.jpg, but on some of the posts (e.g., http://www.partiallyexaminedlife.com/2009/09/18/episode-9-utilitarian-ethics-what-should-we-do/) it's clearly scraping other images.
What I really want is to be able to fix the default image. Any solutions?
Thanks in advance.