F4st1DiO on "[Plugin: Contact Form 7] Another Upload file problem.. :("

I found the problem!
When you upload the file, it can take some time to be "sent" even if the file is very small (like a CV which is 80 kb..) So if you select a file to upload and just after you press the Send button, nothing happen.
It is possible to show a progress bar? Or disable the send button before the file is ready?