Interesaint can't handle new feed content

[arimwilson]

Getting:

Property content must be convertible to a Text instance (Text() argument should be str or unicode, not list)
Traceback (most recent call last):
File "/base/data/home/runtimes/python27/python27_lib/versions/third_party/webapp2-2.3/webapp2.py", line 1511, in call
rv = self.handle_exception(request, response, e)
File "/base/data/home/runtimes/python27/python27_lib/versions/third_party/webapp2-2.3/webapp2.py", line 1505, in call
rv = self.router.dispatch(request, response)
File "/base/data/home/runtimes/python27/python27_lib/versions/third_party/webapp2-2.3/webapp2.py", line 1253, in default_dispatcher
return route.handler_adapter(request, response)
File "/base/data/home/runtimes/python27/python27_lib/versions/third_party/webapp2-2.3/webapp2.py", line 1077, in call
return handler.dispatch()
File "/base/data/home/runtimes/python27/python27_lib/versions/third_party/webapp2-2.3/webapp2.py", line 547, in dispatch
return self.handle_exception(e, self.app.debug)
File "/base/data/home/runtimes/python27/python27_lib/versions/third_party/webapp2-2.3/webapp2.py", line 545, in dispatch
return method(_args, *_kwargs)
File "/base/data/home/apps/s~interesaint/1.368738120591531978/interesaint.py", line 363, in get
comments = comments)
File "/base/data/home/runtimes/python27/python27_lib/versions/1/google/appengine/ext/db/init.py", line 973, in init
prop.set(self, value)
File "/base/data/home/runtimes/python27/python27_lib/versions/1/google/appengine/ext/db/init.py", line 617, in set
value = self.validate(value)
File "/base/data/home/runtimes/python27/python27_lib/versions/1/google/appengine/ext/db/init.py", line 2809, in validate
(self.name, self.data_type.name, err))
BadValueError: Property content must be convertible to a Text instance (Text() argument should be str or unicode, not list)

from the standard feed.