Looks like authors can be a list. Who knew?
Anyway, since you're trying to end up with a list, just wrap the offending line:
On Sun, May 19, 2013 at 5:41 AM, J Luis <jmf...@gmail.com
> I keep getting this error when trying to convert a sphinx project. Windows7
> + python2.7 here
> Any ideas why?
> resolving references...
> writing gmt5... [ERROR] pdfbuilder.py:130 'list' object has no attribute
> Traceback (most recent call last):
> line 127, in write
> docwriter.write(doctree, destination)
> line 80, in write
> line 582, in translate
> AttributeError: 'list' object has no attribute 'split'
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