blocks with image but no text

I love this theme. Very clean.

However, I when I pulled in an image without any accompanying text into one of the blocks (we'll call it Block 1) of the right sidebar, there was no space between the bottom of the image and the top of the gray bar of the block (we'll call it Block 2) beneath it.

The gray bar of Block 2 was very tall and the image from Block 1 was layered over top of it. The white header text of Block 2, however, was positioned correctly in relation to the image above it.

When I added a line of text beneath the image, the problem was resolved.