Why is my board password not accepted ?

Hi,

I am programming my Yun via Wifi from the Arduino IDE.

It always worked well till a couple of days ago. When I get prompted "Type the board password to upload a new sketch", my password is never accepted.
I am sure I am using the right password, since I am able to ssh connect in the yun.

I switched to windows to make sure it's not caused by the actual board, and I can confirm it's not: Arduino IDE on windows accepts the password.

I am using ElementaryOS, there is no firewall.
I tried completely re-installing the IDE, upgrading it, downgrading it, sill no luck and this password window consistently prompts.

Help would be much appreciated.

Regards,

Guilhem