Created attachment 109897 [details]
This PDF file exhibits the problem described in this bug.

  I've encountered this same problem. I think it has more to do with how the rendered LaTeX is converted to SVG, as opposed to a problem with evince. Here is how I dealt with it, from within inkscape:

1) Select the rendered LaTeX
2) Under "Fill and Stroke", go to the "fill" tab and make sure that the selection is filled. 
3) Now go to the "Stroke" tab and make sure the selection is not stroked.

The rendered LaTeX will now display and print correctly. 

 

I couldn't reproduce the bug with Evince 2.28.1. Could you confirm this ?

Created attachment 148884 [details]
PDF conversion

I believe I am seeing this same bug. I have generated the attached PDF using inkscape, by creating a path and then assigning the stroke a gradient value 

The PDF is then converted using inkscape at the command line:

$ inkscape bug-stroke.svg -A bug-stroke.pdf

Viewing in acrobat reader is fine, viewing in evince creates a gradient filled rectangle, with the dimensions the size of the bounding box for the stroke.

-- SVG FILE --

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!-- Created with Inkscape (http://www.inkscape.org/) -->

<svg
   xmlns:dc="http://purl.org/dc/elements/1.1/"
   xmlns:cc="http://creativecommons.org/ns#"
   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
   xmlns:svg="http://www.w3.org/2000/svg"
   xmlns="http://www.w3.org/2000/svg"
   xmlns:xlink="http://www.w3.org/1999/xlink"
   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
   width="744.09448819"
   height="1052.3622047"
   id="svg3856"
   version="1.1"
   inkscape:version="0.47pre4 r22446"
   sodipodi:docname="New document 1">
  <defs
     id="defs3858">
    <linearGradient
       inkscape:collect="always"
       id="linearGradient4648">
      <stop
         style="stop-color:#000000;stop-opacity:1;"
         offset="0"
         id="stop4650" />
      <stop
         style="stop-color:#000000;stop-opacity:0;"
         offset="1"
         id="stop4652" />
    </linearGradient>
    <inkscape:perspective
       sodipodi:type="inkscape:persp3d"
       inkscape:vp_x="0 : 526.18109 : 1"
       inkscape:vp_y="0 : 1000 : 0"
       inkscape:vp_z="744.09448 : 526.18109 : 1"
       inkscape:persp3d-origin="372.04724 : 350.78739 : 1"
       id="perspective3864" />
    <linearGradient
       inkscape:collect="always"
       xlink:href="#linearGradient4648"
       id="linearGradient4654"
       x1="227.79448"
       y1="402.83409"
       x2="386.37827"
       y2="402.83409"
       gradientUnits="userSpaceOnUse" />
  </defs>
  <sodipodi:namedview
     id="base"
     pagecolor="#ffffff"
     bordercolor="#666666"
     borderopacity="1.0"
     inkscape:pageopacity="0.0"
     inkscape:pageshadow="2"
     inkscape:zoom="0.49497475"
     inkscape:cx="-27.616084"
     inkscape:cy="579.41548"
     inkscape:document-units="px"
     inkscape:current-layer="layer1"
     showgrid="false"
     inkscape:window-width="1280"
     inkscape:window-height="967"
     inkscape:window-x="0"
     inkscape:window-y="0"
     inkscape:window-maximized="1" />
  <metadata
     id="metadata3861">
    <rdf:RDF>
      <cc:Work
         rdf:about="">
        <dc:format>image/svg+xml</dc:format>
        <dc:type
           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
        <dc:title></dc:title>
      </cc:Work>
    </rdf:RDF>
  </metadata>
  <g
     inkscape:label="Layer 1"
     inkscape:groupmode="layer"
     id="layer1">
    <path
       style="fill:none;stroke:url(#linearGradient4654);stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;fill-opacity:1"
       d="M 228.29448,494.75798 385.87827,310.91021"
       id="path3866" />
  </g>
</svg>

This is a poppler bug, could you please forward it to the freedesktop bugzilla?

Done: https://bugs.freedesktop.org/show_bug.cgi?id=25405