Dear all, We have customers found that using the Site Builder 4.0.0 Photo Gallery module, then upload some images, and then publish. Everything works fine. Thumbnail generated successfully, and the customer can view the actual image after drilling in that image. Then the customer goto SB4 and change the name of the photo, then publish it again, the original thumbnail size become much bigger (i.e. same as the actual size one). And consequently, his gallery contains some big 'thumbnail' and some normal 'smal thumbnail'. Please help. (please do not suggest me to upgrade to 4.2.x , as the our past upgrade test seems lossing customer module data, and need them to re-create that module) Thank you very much for your kind attention. Regards, George.