Photo's

Hello, I have a issue thats new and not sure if it is with the Wordpress iPhone app or with the Catch Box theme. It just started sometime after my post on Feb. 26th, prior posts work and newer posts it does not. I post a lot of photos on my blog and they view could click on them to see a much larger version. Now they don't do that and I'm not sure of which setting has changed. Any help? The blog is www.rv8-hangar.com Thanks, Michael