Non-square images can provide some unique styling issues.
This post tests a vertical featured image.
A few things to check for:
The following CSS properties will help you support non-breaking text.
-ms-word-wrap: break-word; word-wrap: break-word;
This post has no title, but it still must link to the single post view somehow.
This is typically done by placing the permalink on the post date.
This post has many categories.
This post has many tags.