I have just started using django-cms so please forgive my newbieness.
Every time i try to upload a file in the admin area, for example an image file using c
Yep Timmy O'Mahony was correct. A JS directory was missing. Firebug sorted it.
Another solution for posterity: I solved this issue twice by verifying the server could write to the storage.
First time the bucket policy was broken. In another case the server time was so skewed (as EC2 doesn't sync time) that S3 wouldn't accept the upload. After using NTP and forcing a sync it worked again.