The blog thumbnails takes advantage of the new 2.9 thumbnail functions – if you don’t specify a thumbnail a default image will be used. You can disable thumbnail use via the Musaic options panel altogether if you would prefer not to use any for whatever reason. To specify a thumbnail, simply create a new blog post, or edit an existing one, upload an image of at least 640px width using the post media upload button, and click the ‘Use as Thumbnail’ button. It will be automatically inserted as the thumbnail for the post.
This theme supports nested comments – remember to enable this feature in your admin panel via Settings -> Discussion
The theme has been integrated with PageNavi for better pagination