Comment 8 for bug 1308986

> the imported svg file is attached here.
> (…) and the symbol refuses to drag and drop.

Can't fully confirm - the clone of the symbol is created (copied to the clipboard when selected (produces the first 'Malformed URI' warning), and pasted into the document when drag&dropped (2 more warnings)), but it doesn't render visibly. Watch the messages in the status bar: after drag&dropping from the symbols dialog onto the canvas, it says:
"Clone [orphaned] in layer I-FURN. Use Shift to … "
and the file (attached) now has two clones in the layer 'I-FURN':

  <g
     inkscape:label="I-FURN"
     inkscape:groupmode="layer"
     id="g7683">
    <use
       y="-225.022812"
       x="311.043266"
       xlink:href="#Sof%C3%A1"
       id="use7685" />
    <use
       id="use7983"
       xlink:href="#Sofá"
       x="0"
       y="0"
       width="100%"
       height="100%" />
  </g>