Image previewer on viewrecentblogposts.action doesn't update the image displayed

Steps to reproduce:
1. Visit a space
2. Click the 'blogs' tab (note that your URL should look like /pages/viewrecentblogposts.action)
3. Click an image in the blog list
4. Click a second, different image in the blog list

Expected behaviour
Image previewed is the second image you clicked on

Actual behaviour
Image previewed is the first image you clicked on