Clientside Validation breaks ajax Uploadprogress

On my node edit form, Uploadprogress for file doesn't seem to work when Clientside Validation is activated (the progressbar is inative but the file is correctly uploaded to the serveur).

Disabling Clientside Validation resolve the issue.

Note : i use jquery.form.js version 3.09 (16-APR-2012) && minified version of jquery.validate.js