Myspace app fails to publish with "app does not have valid icons" even though it does

Question

I want to create an app on Myspace. The app creates successfully, but when I publish it the following error occurs:

Failed to publish app: Your app does not have valid icons. Please add a small and large icons and then re-publish.

I have selected 16 and 64 pixel icons, but when I click on the save button the following link opens and the icons do not save...

http://developer.myspace.com/modules/common/static/html/errorpage.html