Hi!
I adore the XXX Theme, but I just wanted to check if there's anyway to make the ENTIRE picture fit within the thumbnail at the blogs homepage? I just feel more comfortable when the entire picture shows, I feel the blog looks more neat.

Thanks so much!
<3 Not-Insane-Just-Human

because of the different size and portrait orientation(portrait or landscape) of each image, it’s not possible to not clip the images without the thumbnail sizes being different or by adding custom script.

you could try putting this in the custom css section on the customize page: 

.fsphoto img { width: 100%; }

to display the full width of landscape-oriented images. portrait-oriented images will still be cropped.