For some reason (perhaps this is now what the MLA wants?) my Zotero bibliography is adding "print" to the citations for all of my books, articles, etc. Can you tell me how to turn this off?
You can't turn it off in the MLA style. It's required.
http://owl.english.purdue.edu/owl/resource/747/01/
No other style has this, so if you want to change it, you can either switch to a different style, or you can use the old MLA style. That's still in the style repository (towards the top)
But you would want to change the ID field so it doesn't get overwritten
http://www.zotero.org/support/csl_simple_edits
Upgrade Storage
http://owl.english.purdue.edu/owl/resource/747/01/
No other style has this, so if you want to change it, you can either switch to a different style, or you can use the old MLA style. That's still in the style repository (towards the top)
But you would want to change the ID field so it doesn't get overwritten
http://www.zotero.org/support/csl_simple_edits