CMS : Date format issue in CSM (schedule, planning...)

Hello

All dates are not well formated, in the CMS. Every character is dedoubled.
See screenshots.
I already tried to change format settings in the general configuration tab, but always the same problem…

Thank you

Screenshots :
https://drive.google.com/file/d/0B0sAX56QJlO2SXk1RkhUbjdBelE/view?usp=sharing
https://drive.google.com/file/d/0B0sAX56QJlO2U2tRNHZkcnc0SDQ/view?usp=sharing

Browser : CHROME

Kind regards,

What do you have in Settings → regional tab in CMS?

Below see the default values: