That's interesting... never seen that before... You have some really interesting thing going on with your rectangle... The y-location and width are attributes of you rectangle element, while the x-location and height are properties of your style attribute. I have came across this before, FZ doesn't read style properties the same as element attributes... or don't read some style properties at all... There are some other properties it there that could be creating problems as well...
I would remove all the unnecessary properties and don't use styles at all...
<rect gorn="0.4.0.0.0.0.0.4" stroke="#ffcc00" y="18.2152" width="1.6" fill="none" id="rect4799" style="opacity:1;fill-rule:nonzero;stroke-linecap:round;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0.5;" stroke-opacity="1" stroke-width="0.39999995" x="1.9474157" fill-opacity="1" height="1.6"/>