This is the issue:
1. I am using image module to create a node
2. I want to enable file attachment (via fileupload) on the node
3. I am using upload_progress to view progress bar during create / edit node
4. The fileupload module to attach files are not working fine (attaching files like infinite process never finishes but status bar in browser shows 'done')
5. Disable upload_progress module makes all prefect again

Regards