Today I have found a change in Orkut while adding my new images. Until today I was able to add only 12 images in my album. But today I found that, I can add more than 12 images in my album. Now it is showing 13 images in my album. After that I have checked official Orkut blog, but there is no post regarding this change. Hopefully this is a recent change and they will post soon regarding this change.

UPDATE: - Zachary John just posted regarding this changes in official Orkut blog. Now they exceed the limit up to 25 images.