spiderable: phantomjs failed: null - meteor

I have been trying to figure out an issue with spiderable for several hours now. I have it installed and running beautifully on my local machine, but once I deploy to production I get this error spiderable: phantomjs failed: null. As you can see, this is not very helpful in debugging the issue.
I have followed all the advice in this excellent post on Meteorpedia, but to no avail:
http://www.meteorpedia.com/read/spiderable/
To make it even more strange, when I run the phantomtest.js script found on the page linked above, everything runs without any issue.
What I would really like to do is to be able to log some debug output from PhantomJS as it's being called by spiderable, but I have no idea if that's even possible. I tried messing around with spiderable code to pass some additional debugging parameters to PhantomJS, but that didn't work for me.
Any input would be greatly appreciated.

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