Background image does not show anymore

Just loaded the new Ray enabled built, and background image does not show anymore.
Do I have to change something to the settings ?

OldLink

OK, just found it : the new Blender built does not accept 8bits indexed colors images anymore (like .GIF images).
I had to convert the image to RGB 24bits to be able to display it as a background image in my front view…

OldLink