Because you’re using a new theme, you’re also using new thumbnail sizes. Download the Regenerate Thumbnails plugin, and use it to regenerate your images. This will allow all of your images thumbnails to display at the proper size.
Because you’re using a new theme, you’re also using new thumbnail sizes. Download the Regenerate Thumbnails plugin, and use it to regenerate your images. This will allow all of your images thumbnails to display at the proper size.