Finder presents different free disk space

This is quite strange. I'm afraid something is going wrong with my SSD disk (256Gb Samsung SSD on MBA 11").

- Permission Repaired.

- Disk Verified, no problem.

- Finder says: you got 85Gb Free

- Disk Info says: you got 85Gb Free

- Disk Utility says: you got 70Gb Free

- System Report says: you got 70Gb Free.

Who is right?

- Opened a Bug to Apple...

- Created a new user, same result...

- Resetted everything I can reset on my MBA...

- Next/Last step will be Genius Bar, but I'm afraid they can't solve this issue too, seems a system-wide bug.

This is happening after the Huge update of iPhoto+Aperture.

Don't know what to do.

Any additional suggestion?