André Rodrigues

First of all, sorry for not having looked at previous issues. I now understand what you mean by _deprecation warnings from Rails aren't super nuanced_. https://github.com/pat/thinking-sphinx/issues/1059 enlightened me on that....

So actually my suggestion as interim solution is actually **wrong** because `saved_changes?` will return false given this is run inside the before_save callback, so I no longer recommend that. Another...

This happened because I did not have the Ghostscript utility installed. Installing the latest Mac Tex distribution solves the issue.