Need help with aligning thumbnails.

Hi there,

I am using your Buddypress Activity Plus Widget.

When a user uploads multiple photos via the upload button, they are stacked vertically down the page. This takes up quite a lot of room on the page.

Could someone please let me know how I can adjust this? I have some understanding of CSS, but not enough to do this confidently.

Here is an example:
http://shuttersociety.net/members/bradstarks/

Thanks!