diff --git a/src/core/sat_main.py b/src/core/sat_main.py
index 2ec50479..09d8a85b 100644
--- a/src/core/sat_main.py
+++ b/src/core/sat_main.py
@@ -811,7 +811,7 @@ class SAT(service.Service):
 
     def _progressGet(self, progress_id, profile):
         data = self.progressGet(progress_id, profile)
-        return {k: unicode(v) for k,v in data}
+        return {k: unicode(v) for k,v in data.iteritems()}
 
     def progressGet(self, progress_id, profile):
         """Return a dict with progress information
@@ -824,11 +824,10 @@ class SAT(service.Service):
             if id doesn't exists (may be a finished progression), and empty dict is returned
         """
         client = self.getClient(profile)
-        data = {}
         try:
-            client._progress_cb[progress_id](progress_id, data, profile)
+            data = client._progress_cb[progress_id](progress_id, profile)
         except KeyError:
-            log.debug("Requested progress for unknown progress_id")
+            data = {}
         return data
 
     def _progressGetAll(self, profile_key):
@@ -844,9 +843,9 @@ class SAT(service.Service):
 
         @param profile_key: %(doc_profile)s get all progress from this profile
             if C.PROF_KEY_ALL is used, all progress from all profiles are returned
-        @return (dict[dict]): key=progress id, value=dict of data with the following keys:
-            'position' (int): current possition
-            'size' (int): end_position
+        @return (dict[dict[dict]]): a dict which map profile to progress_dict
+            progress_dict map progress_id to progress_data
+            progress_data is the same dict as returned by [progressGet]
         """
         clients = self.getClients(profile_key)
         progress_all = {}
diff --git a/src/plugins/plugin_misc_file.py b/src/plugins/plugin_misc_file.py
index 1b653677..66a47890 100644
--- a/src/plugins/plugin_misc_file.py
+++ b/src/plugins/plugin_misc_file.py
@@ -66,7 +66,7 @@ class SatFile(object):
         self.host = host
         self.uid = uid or unicode(uuid.uuid4())
         self._file = open(path, mode)
-        self.size = None
+        self.size = size
         self.profile = profile
         self.eof = defer.Deferred()
         self.host.registerProgressCb(self.uid, self.getProgress, profile)
@@ -96,8 +96,8 @@ class SatFile(object):
     def tell(self):
         return self._file.tell()
 
-    def getProgress(self, progress_id, data, profile):
-        return {'position': self._file.tell(), 'size': self.size or 0}
+    def getProgress(self, progress_id, profile):
+        return {'position': self._file.tell(), 'size': self.size or -1}
 
 
 class FilePlugin(object):
diff --git a/src/plugins/plugin_xep_0234.py b/src/plugins/plugin_xep_0234.py
index b6a46bf0..b9715929 100644
--- a/src/plugins/plugin_xep_0234.py
+++ b/src/plugins/plugin_xep_0234.py
@@ -100,7 +100,7 @@ class XEP_0234(object):
     # jingle callbacks
 
     def jingleSessionInit(self, session, content_name, filepath, name, file_desc, progress_id_d, profile=C.PROF_KEY_NONE):
-        progress_id_d.callback(self.getProgressId(session, content_name))
+        progress_id_d.callback(self._getProgressId(session, content_name))
         content_data = session['contents'][content_name]
         application_data = content_data['application_data']
         assert 'file_path' not in application_data