diff --git a/wagtail/tests/fixtures/test.json b/wagtail/tests/fixtures/test.json
index 94087443532..208005b2b8b 100644
--- a/wagtail/tests/fixtures/test.json
+++ b/wagtail/tests/fixtures/test.json
@@ -256,6 +256,20 @@
         "page": 8
     }
 },
+{
+    "pk": 3,
+    "model": "tests.formfield",
+    "fields": {
+        "sort_order": 3,
+        "label": "Your choices",
+        "field_type": "checkboxes",
+        "required": false,
+        "choices": "foo,bar,baz",
+        "default_value": "",
+        "help_text": "",
+        "page": 8
+    }
+},
 
 {
     "pk": 10,
diff --git a/wagtail/wagtailforms/models.py b/wagtail/wagtailforms/models.py
index 79dcaa0e2d0..843e92f4b96 100644
--- a/wagtail/wagtailforms/models.py
+++ b/wagtail/wagtailforms/models.py
@@ -46,7 +46,15 @@ class FormSubmission(models.Model):
     submit_time = models.DateTimeField(auto_now_add=True)
 
     def get_data(self):
-        return json.loads(self.form_data)
+        # Convert sequences to strings.
+        # This check is required because form values used to be stored
+        # as strings and our now stored as lists, so form data may
+        # contain a mix of lists and strings.
+        data = json.loads(self.form_data)
+        for k, v in data.iteritems():
+            if hasattr(v, '__iter__'):
+                data[k] = ", ".join(data[k])
+        return data
 
     def __str__(self):
         return self.form_data
@@ -133,7 +141,7 @@ def get_form_parameters(self):
     def process_form_submission(self, form):
         # remove csrf_token from form.data
         form_data = dict(
-            i for i in form.data.items()
+            i for i in form.data.iterlists()
             if i[0] != 'csrfmiddlewaretoken'
         )
 
diff --git a/wagtail/wagtailforms/tests.py b/wagtail/wagtailforms/tests.py
index 28df108ab79..363776a67f0 100644
--- a/wagtail/wagtailforms/tests.py
+++ b/wagtail/wagtailforms/tests.py
@@ -24,7 +24,9 @@ def test_get_form(self):
 
     def test_post_invalid_form(self):
         response = self.client.post('/contact-us/', {
-            'your-email': 'bob', 'your-message': 'hello world'
+            'your-email': 'bob',
+            'your-message': 'hello world',
+            'your-choices': ''
         })
 
         # Check response
@@ -34,7 +36,9 @@ def test_post_invalid_form(self):
 
     def test_post_valid_form(self):
         response = self.client.post('/contact-us/', {
-            'your-email': 'bob@example.com', 'your-message': 'hello world'
+            'your-email': 'bob@example.com',
+            'your-message': 'hello world',
+            'your-choices': {'foo': '', 'bar': '', 'baz': ''}
         })
 
         # Check response
@@ -53,6 +57,27 @@ def test_post_valid_form(self):
         form_page = Page.objects.get(url_path='/home/contact-us/')
         self.assertTrue(FormSubmission.objects.filter(page=form_page, form_data__contains='hello world').exists())
 
+    def test_post_multiple_values(self):
+        response = self.client.post('/contact-us/', {
+            'your-email': 'bob@example.com',
+            'your-message': 'hello world',
+            'your-choices': {'foo': 'on', 'bar': 'on', 'baz': 'on'}
+        })
+
+        # Check response
+        self.assertContains(response, "Thank you for your feedback.")
+        self.assertTemplateNotUsed(response, 'tests/form_page.html')
+        self.assertTemplateUsed(response, 'tests/form_page_landing.html')
+
+        # Check that the three checkbox values were saved correctly
+        form_page = Page.objects.get(url_path='/home/contact-us/')
+        submission = FormSubmission.objects.filter(
+            page=form_page, form_data__contains='hello world'
+        )
+        self.assertIn("foo", submission[0].form_data)
+        self.assertIn("bar", submission[0].form_data)
+        self.assertIn("baz", submission[0].form_data)
+
 
 class TestPageModes(TestCase):
     fixtures = ['test.json']
@@ -89,7 +114,7 @@ def test_fields(self):
         This tests that all fields were added to the form with the correct types
         """
         form_class = self.fb.get_form_class()
-        
+
         self.assertTrue('your-email' in form_class.base_fields.keys())
         self.assertTrue('your-message' in form_class.base_fields.keys())