Drupal: issue with choosing the files to upload

I've an issue with uploading files with Drupal CCK fields.

The issue is client-side. When I click on the "Choose File" button in my browser, all the files in my "Choosing file" operating system popup window are disabled.

It was working before, and for example the extension ".png" is written below the field, so I know it is accepted, but the file is disabled and I canno开发者_开发问答t select it.

Quite strange.. do you have any idea ? Thanks

I ran into this too. See this ticket for details. Fixed in FileField and ImageField 3.8.