--- a/src/pyams_file/zmi/image.py	Tue Feb 06 13:58:18 2018 +0100
+++ b/src/pyams_file/zmi/image.py	Fri Feb 09 15:38:35 2018 +0100
@@ -161,7 +161,7 @@
 
     @property
     def label(self):
-        return '<div>{label}</div><div class="padding-y-5"><img src="{url}/++thumb++square:200x128.jpeg?_=" ' \
+        return '<div>{label}</div><div class="padding-y-5"><img src="{url}/++thumb++square:200x128?_=" ' \
                '/></div>'.format(label=self.request.localizer.translate(self._label),
                                  url=absolute_url(self.context, self.request))
 
@@ -244,7 +244,7 @@
 
     @property
     def label(self):
-        return '<div>{label}</div><div class="padding-y-5"><img src="{url}/++thumb++pano:200x128.jpeg?_=" ' \
+        return '<div>{label}</div><div class="padding-y-5"><img src="{url}/++thumb++pano:200x128?_=" ' \
                '/></div>'.format(label=self.request.localizer.translate(self._label),
                                  url=absolute_url(self.context, self.request))
 
@@ -382,7 +382,7 @@
 
     @property
     def label(self):
-        return '<div>{label}</div><div class="padding-y-5"><img src="{url}/++thumb++xs:200x128.jpeg?_=" ' \
+        return '<div>{label}</div><div class="padding-y-5"><img src="{url}/++thumb++xs:200x128?_=" ' \
                '/></div>'.format(label=self.request.localizer.translate(self._label),
                                  url=absolute_url(self.context, self.request))
 
@@ -423,7 +423,7 @@
 
     @property
     def label(self):
-        return '<div>{label}</div><div class="padding-y-5"><img src="{url}/++thumb++sm:200x128.jpeg?_=" ' \
+        return '<div>{label}</div><div class="padding-y-5"><img src="{url}/++thumb++sm:200x128?_=" ' \
                '/></div>'.format(label=self.request.localizer.translate(self._label),
                                  url=absolute_url(self.context, self.request))
 
@@ -464,7 +464,7 @@
 
     @property
     def label(self):
-        return '<div>{label}</div><div class="padding-y-5"><img src="{url}/++thumb++md:200x128.jpeg?_=" ' \
+        return '<div>{label}</div><div class="padding-y-5"><img src="{url}/++thumb++md:200x128?_=" ' \
                '/></div>'.format(label=self.request.localizer.translate(self._label),
                                  url=absolute_url(self.context, self.request))
 
@@ -505,7 +505,7 @@
 
     @property
     def label(self):
-        return '<div>{label}</div><div class="padding-y-5"><img src="{url}/++thumb++lg:200x128.jpeg?_=" ' \
+        return '<div>{label}</div><div class="padding-y-5"><img src="{url}/++thumb++lg:200x128?_=" ' \
                '/></div>'.format(label=self.request.localizer.translate(self._label),
                                  url=absolute_url(self.context, self.request))
 
@@ -588,7 +588,7 @@
                 selection = thumbnails.get_selection(name)
                 transaction.commit()
                 thumbnails = IThumbnail(selection)
-            thumbnails.get_thumbnail('200x128', 'jpeg')
+            thumbnails.get_thumbnail('200x128')
             thumbnailers.setdefault(translate(adapter.section), []).append({'name': name,
                                                                             'label': translate(adapter.label)})
         transaction.commit()