Change in image lazy loading: images are hidden by default, and only if successfully loaded they are displayed.
When lazy loading images, add a display:block CSS class and horizontally center them only if they are wider than 30% of the feed-entries div.

This is intended for small images, like social buttons at the bottom of an entry. These small images look ugly if each is horizontally centered and displayed in individual rows (with display:block). In these cases it's better to let them fill a single row.