This post tests comments in the following ways. Threaded comments up to 10 levels deep Paginated comments (set Settings > Discussion > Break comments into pages to 5 top level comments per page) Comment markup / formatting Comment images Comment videos Author comments Gravatars and default fallbacks  

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This post has many pingpacks and trackbacks. There are a few ways to list them. Above the comments. Below the comments Included within the normal flow of comments.