Thanks for that. My search just found the patch where that assert was added.

It looks like the bug is just in the display; I can save and view using rsvg-view and it's OK.

I'm now making clones and clipping them individually, which seems to work.

Dear Experts, I'm attempting to get a "concertina" effect like this (if my ASCII art works): +------+ .\........\ ..\........\ ../......../ ./......../ .\........\ ..\........\ ...+------+ i.e. I already have a fairly complex "flat" image, and now I want to make it look like it h...