diff -r 51225e522007 -r aec074085a81 src/hdalab/views/profile.py
--- a/src/hdalab/views/profile.py	Tue Sep 23 15:51:35 2014 +0200
+++ b/src/hdalab/views/profile.py	Wed Sep 24 13:07:08 2014 +0200
@@ -121,6 +121,12 @@
         
         form = AuthenticationForm(self.request)
         context["form"] = form
+        current_url = self.request.get_full_path()
+        if "shape=circle" in current_url:
+            switch_shape_url = current_url.replace("&shape=circle", "")
+        else:
+            switch_shape_url = current_url + "&shape=circle"
+        context["switch_shape_url"] = switch_shape_url
         
         return context