TEXT or BLOB columns in MySQL can't have default values: see http://dev.mysql.com/doc/refman/5.6/en/blob.html (not just in 5.6 but all the way back to 5.0). I'm running MySQL 5.6.13 on Mac and this throws a nasty error.
Apparently this is not enforced consistently across different versions of MySQL on different platforms which is pretty bad and why you might not have seen this.
Fix in GitHub. It didn't throw an error in mysql 5.5... argh.