Image caption issue with WP 3.4

My image captions not being aligned under the image or in the caption frame (the frame is lost) after the upgrade to 3.4. I use theme Twenty-Eleven, and I haven’t done anything except hit the update button. I know nothing about code, so I’m not sure what to do to fix this…

My old posts are fine, my new post is not: http://lexireidstudio.com/2012/06/17/shadow-boxes-and-three-dimensional-collages/

Any assistance would be greatly appreciated!!