Digged deeper and reported this issue https://code.google.com/p/googleappengine/issues/detail?id=11067
I think the images.Image and the included features should be improved with JPEG/EXIF in mind There should be a method that simply gets metadata/dimensions, without the need for pseudo transformations just to force their computation -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/google-appengine. For more options, visit https://groups.google.com/d/optout.
