i'm pretty sure that these 'new' planet images are actually the original planet images. i tried to hunt down the forum discussion where they got rolled out, but i can't find it even with google site search.
i updated the Planets wiki page to include the current links to the planet images since the 4.digit IP address that was there previously no longer directs anywhere.
so whoever sees the 'new' planet images likely is seeing 'beta' on the GL header .. so that is what 2011 era ??
EDIT:
viewtopic.php?f=7&t=11517 (2011 vintage)