All of the images on the homepage excerpts are being cropped. I want the full image to show up for each excerpt on the homepage. How do I do this? Thanks.

need to see an example to venture a guess

Here's the site: HomeschoolWithLove

does the post have a featured image? or are you using a thumbnail plugin?

All of my posts have featured images. It was never an issue before.

These are the plugins I'm using:
Akismet
AuthorSure
BackWPup
Better WP Security
CommentLuv
Contact Form 7
Google Analytics for Wordpress
nRelate Related Content
Shareaholic
Social Media Widget
Wordpress SEO

Swap to twenty twelve and see is you see the same issue