When rendered to a PDF, the gradients show up as a rectangular block, instead of being contained by the stroked line. Acrobat Reader renders the PDF correctly. Evince does not. Originally filed as a bug in Cairo: http://bugs.freedesktop.org/show_bug.cgi?id=16222
Created attachment 16922 [details] stroked gradient testcase
*** This bug has been marked as a duplicate of bug 10942 ***
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