I use the Fanfictiondownloader plugin to grab new fanfiction and update the ones already in my library. I'll try the plugin on another of them and see what happens.
Yup, I tried 3 different stories grabbed with FFDL from 2 different sites, all give the same error. The ones not downloaded with FFDL I could modify without a problem.
I think the problem is with the FFDL template.
Spoiler:
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<dc:identifier id="fanficdownloader-uid">fanficdownloader-uid:archive.skyehawke.com-u781-s5036</dc:identifier><dc:title>A Year Like None Other</dc:title><dc:contributor opf:role="bkp">fanficdownloader [http://fanficdownloader.googlecode.com]</dc:contributor><dc:rights/><dc:date opf:event="publication">2004-12-03</dc:date><dc:date opf:event="creation">2012-05-14</dc:date><dc:date opf:event="modification">2004-12-02T23:00:00+00:00</dc:date><meta content="2007-03-25T00:00:00" name="calibre:timestamp"/><dc:description>COMPLETE. It all started with a letter from home and family. Except, Harry doesn't really have either, does he? He's about to get them. A Snape-adopts-Harry story providing an alternate 6th year. Winner: Multifaceted Best Genfic, Best Draco Fic.</dc:description><dc:publisher>archive.skyehawke.com </dc:publisher><dc:identifier opf:scheme="URL">http://archive.skyehawke.com/story.php?no=5036</dc:identifier><dc:source>http://archive.skyehawke.com/story.php?no=5036</dc:source><meta name="calibre:title_sort" content="A Year Like None Other,"/>
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<dc:subject>HP</dc:subject>
<dc:subject>Drama</dc:subject>
<dc:subject>Completed</dc:subject>
<dc:subject>Harry Potter</dc:subject>
<dc:subject>Draco Malfoy</dc:subject>
<dc:subject>Severus Snape</dc:subject>
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