diff --git a/gradio/networking.py b/gradio/networking.py
index 1c013b193a..4cf0072ae9 100644
--- a/gradio/networking.py
+++ b/gradio/networking.py
@@ -16,6 +16,8 @@ from shutil import copyfile
 import requests
 import sys
 import analytics
+import csv
+
 
 INITIAL_PORT_VALUE = int(os.getenv(
     'GRADIO_SERVER_PORT', "7860"))  # The http server will try to open on port 7860. If not available, 7861, 7862, etc.
@@ -183,18 +185,32 @@ def serve_files_in_background(interface, port, directory_to_serve=None, server_n
                 os.makedirs(interface.flagging_dir, exist_ok=True)
                 output = {'inputs': [interface.input_interfaces[
                     i].rebuild(
-                    interface.flagging_dir, msg['data']['input_data']) for i
+                    interface.flagging_dir, msg['data']['input_data'][i]) for i
                     in range(len(interface.input_interfaces))],
                     'outputs': [interface.output_interfaces[
                         i].rebuild(
-                        interface.flagging_dir, msg['data']['output_data']) for i
+                        interface.flagging_dir, msg['data']['output_data'][i])
+                        for i
                     in range(len(interface.output_interfaces))]}
 
-                with open("{}/log.txt".format(interface.flagging_dir),
-                          'a+') as f:
-                    f.write(json.dumps(output))
-                    f.write("\n")
+                log_fp = "{}/log.csv".format(interface.flagging_dir)
 
+                is_new = not os.path.exists(log_fp)
+
+                with open(log_fp, "a") as csvfile:
+                    headers = ["input_{}".format(i) for i in range(len(
+                        output["inputs"]))] + ["output_{}".format(i) for i in
+                                               range(len(output["outputs"]))]
+                    writer = csv.DictWriter(csvfile, delimiter=',',
+                                            lineterminator='\n',
+                                            fieldnames=headers)
+                    if is_new:
+                        writer.writeheader()
+
+                    writer.writerow(
+                        dict(zip(headers, output["inputs"] +
+                                  output["outputs"]))
+                    )
             else:
                 self.send_error(404, 'Path not found: {}'.format(self.path))
 
diff --git a/gradio/outputs.py b/gradio/outputs.py
index 071fc384e2..c00cea639c 100644
--- a/gradio/outputs.py
+++ b/gradio/outputs.py
@@ -114,7 +114,8 @@ class Label(OutputComponent):
         """
         Default rebuild method for label
         """
-        return json.loads(data)
+        # return json.loads(data)
+        return data
 
 class Image(OutputComponent):
     '''
diff --git a/gradio/static/js/all_io.js b/gradio/static/js/all_io.js
index 23978901ce..0bdb9c032a 100644
--- a/gradio/static/js/all_io.js
+++ b/gradio/static/js/all_io.js
@@ -59,8 +59,8 @@ var io_master_template = {
   flag: function() {
     var post_data = {
       'data': {
-        'input_data' : toStringIfObject(this.last_input) ,
-        'output_data' : toStringIfObject(this.last_output)
+        'input_data' : this.last_input ,
+        'output_data' : this.last_output
       }
     }
     $.ajax({type: "POST",
diff --git a/gradio/utils.py b/gradio/utils.py
index a3d56fa9fe..dd0610cb03 100644
--- a/gradio/utils.py
+++ b/gradio/utils.py
@@ -24,7 +24,8 @@ def colab_check():
     is_colab = False
     try:  # Check if running interactively using ipython.
         from_ipynb = get_ipython()
-        if "google.colab" in str(from_ipynb):
+        if "google.colab" in str(from_ipynb) or "ipykernel" in str(
+                from_ipynb):
             is_colab = True
     except NameError:
         error_analytics("NameError", analytics_url)