Clipart (with logo) usage

Hi all,
I'm working on this bug and the associated review request:
https://git.reviewboard.kde.org/r/122080/
https://bugs.kde.org/show_bug.cgi?id=342710

As you can see from the bug, Allen suggested the usage of the "Part of KDE
Family" clipart from:
https://www.kde.org/stuff/clipart.php

My questions are:
- do you think it's the proper logo there?
- what is the license of the image? I didn't see it on the related dot and
forum pages:
https://dot.kde.org/2010/05/12/being-kde
https://dot.kde.org/2010/06/05/voting-opens-kde-software-label-designs
https://dot.kde.org/2010/06/21/introducing-your-kde-software-labels
https://forum.kde.org/viewtopic.php?f=157&t=88231

I guess that they can be considered as derived works from the logo (LGPL),
still there are few possibilities (GPL2? LGPL2+? LGPL3?)


Final remarks:
- please comment on the review request
- anyway, if you answer here, please keep me on CC as I'm not subscribed to
kde-promo (kde-doc-english in CC for reference, kde-promo is the main target
of this message).

Thanks!
-- 
Luigi

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