Adobe Photoshop Express on iPhone 4 - was doing a CROP and could not complete crop or even exit app. Had to reboot. I spent 15 min trying everything to get it to move. Crop window was able to be moved and resized but no other action. A 10/10 bug.
I've tried on a couple difference devices, and I can not reproduce. So let me ask you for more details to see if we can narrow this down.
--Are these images taken with the iPhone 4, or imported via iTunes or a Camera Kit? If the latter, what is the original size (megabytes and image pixel dimension) of the image
--What version of iPhone OS are you running? Is it an official release version?
--What version of Photoshop Express are you running? Is it the latest version on the app store?
--In your device Settings, do you have Location Services enabled or disabled?