Massimo fixed https://gitlab.gnome.org/GNOME/librsvg/issues/91 - if you ever did "eog pitivi-icons.svg" and they looked weird, that's the reason. Also for libreoffice-*.svg.
The bug commonly just showed up on EOG... since it is one of the few apps passing a non-identity transformation to librsvg when rendering. Librsvg was screwing up clipping paths when the initial transformation is not an identity one.
And I just remembered about this bug by chance. Was looking at rsvg-bench, and how the libreoffice icons are much bigger/slower than other icons. Then I looked at one in EOG, and it was wrong. Then I looked at it in rsvg-view, and it was okay.
So I remembered about a bug I had seen in Bugzilla a long time ago... and there it was, with a proposed fix since two years ago.
Kids, do bug triage. #fail