I am having the same problem as weekendgypsy. The page is http://wovenbyjolyn.com/finished-pieces/scarves/. You will see that the earlier media additions to this page are 3-across, but the ones added today just display vertically, one per line. From the post above, I thought the size might be the problem, but on the "edit" screen the sizes seem similar to previous photos. I just updated to Mavericks. Could that be the issue? Also, when I went to edit the page, I didn't get what I usually see, which is a blank page from which I click an Edit button to see the images. I just saw the images right away (on "visual"). Also, I thought previously I could reorder the images, or move them around, but I can no longer find those options. Has something changed with WordPress? Thank you very much.