I added the "color" property to the style of the original HTML-document above:
Code:
.link {
fill: none;
stroke: #BEC3C7;
stroke-width: 1px;
color: red;
}
Again, the conversion does not keep this .link rule. The "color" property really must be known.
So the "strange properties" is probably not the issue.
I opened the hand-fixed
http://ilyakantor.ru/b.epub.zip in Calibre, iBooks, Sigil, all 3 programs programs show it well.
That's the screenshot from Sigil:
http://ilyakantor.ru/screen/2015-01-24_0054.png (the path is styled correctly).
So "unsupported properties" is not an issue too here, just because all 3 readers are fine with it.
What remains is a converter issue.
Maybe that's because the converter adds svg: namespace to the svg tag and inside it, and things become messed up?