OK, I think finally fixed. I replaced all the rectangles (which don’t seem to be supported in SVG tiny) with paths and redid (mostly simlifying) the text and set the stroke-width to simple numbers (no trailing px) and it now seems to render in Frizting:
Here is the new svg
and the part that it creates
test1.fzpz (6.6 KB)
Now back to why a perfectly standard schematic created by Randy’s extension doesn’t render correctly in Frizing!
Peter