To reproduce:
1. enable remote staging for a site
2. add a page to the site
3. navigate to the page, add a blog display portlet
4. add a new blog entry, upload a cover image
5. publish to remote live
6. navigate to remote live
7. click on cover image
Actual result:
"Portlet is temporarily unavailable." is displayed. Exception is thrown to console, see trace here.
Expected:
Blog entry to be displayed