diff -r ed812f1f7592 -r c752fdee555b src/hdalab/views/ajax.py
--- a/src/hdalab/views/ajax.py	Tue Mar 17 22:10:17 2015 +0100
+++ b/src/hdalab/views/ajax.py	Wed Mar 18 18:52:43 2015 +0100
@@ -28,7 +28,7 @@
     labels = request.GET.get('labels',None)
 
     if not labels:
-        return HttpResponse(content=json.dumps({}), mimetype='application/json')
+        return HttpResponse(content=json.dumps({}), content_type='application/json')
     
     labelslist = [lbl.strip() for lbl in labels.split(",")]
     masters = []
@@ -44,7 +44,7 @@
     
     translations = dict([(t.master.label, t.label) for t in translationqs])
     
-    return HttpResponse(content=json.dumps(translations), mimetype='application/json')
+    return HttpResponse(content=json.dumps(translations), content_type='application/json')
 
 def subcat(category, globtags, level, max_level ):
     # recursive function used by cattree
@@ -130,7 +130,7 @@
             })
     cleantags(resobj)
     
-    return HttpResponse(content=json.dumps(resobj), mimetype='application/json')
+    return HttpResponse(content=json.dumps(resobj), content_type='application/json')
 
 def sessioninfo(request):
     
@@ -170,7 +170,7 @@
     if write:
         resobj['sessionkey'] = request.session['sessionkey']
         
-    return HttpResponse(content=json.dumps(resobj), mimetype='application/json')
+    return HttpResponse(content=json.dumps(resobj), content_type='application/json')
 
 
 def tagsearch(request):
@@ -236,7 +236,7 @@
             if q is None or resobj['value'].lower().find(lq) != -1:
                 res.append(resobj)
     
-    return HttpResponse(content=json.dumps(res), mimetype='application/json')
+    return HttpResponse(content=json.dumps(res), content_type='application/json')
 
 def catsearch(request):
     
@@ -252,7 +252,7 @@
     
     res = [{'value':t.label} for t in qs]
     
-    return HttpResponse(content=json.dumps(res), mimetype='application/json')
+    return HttpResponse(content=json.dumps(res), content_type='application/json')
 
 def filter(request):
     
@@ -267,7 +267,7 @@
     
     outputstr = filter_generic(lang, periode, label, country, contentlist, max_tag_order, content_count, tag_count)
         
-    return HttpResponse(content=outputstr, mimetype='application/json')
+    return HttpResponse(content=outputstr, content_type='application/json')
 
 
 def filter_generic(lang="fr-fr", periode=None, label=None, country=None, contentlist=None, max_tag_order=12, content_count=8, tag_count=30):
@@ -490,4 +490,4 @@
     
     res = subtree(treeobj)
         
-    return HttpResponse(content=json.dumps(res), mimetype='application/json')
+    return HttpResponse(content=json.dumps(res), content_type='application/json')