--- a/web/data/cubicweb.edition.js	Mon Sep 21 18:02:59 2009 +0200
+++ b/web/data/cubicweb.edition.js	Mon Sep 21 18:03:10 2009 +0200
@@ -254,7 +254,7 @@
         form.insertBefore(insertBefore).slideDown('fast');
         updateInlinedEntitiesCounters(rtype);
         reorderTabindex();
-        form.trigger('inlinedform-added');
+        jQuery(CubicWeb).trigger('inlinedform-added', form);
         // if the inlined form contains a file input, we must force
         // the form enctype to multipart/form-data
         if (form.find('input:file').length) {
@@ -350,11 +350,11 @@
 }
 
 
-function handleFormValidationResponse(formid, onsuccess, onfailure, result) {
+function handleFormValidationResponse(formid, onsuccess, onfailure, result, cbargs) {
     // Success
     if (result[0]) {
 	if (onsuccess) {
-             onsuccess(result, formid);
+             onsuccess(result, formid, cbargs);
 	} else {
 	    document.location.href = result[1];
 	}
@@ -374,7 +374,7 @@
     updateMessage(_('please correct errors below'));
     document.location.hash = '#header';
     if (onfailure) {
-	onfailure(formid);
+	onfailure(formid, cbargs);
     }
     return false;
 }

--- a/web/views/autoform.py	Mon Sep 21 18:02:59 2009 +0200
+++ b/web/views/autoform.py	Mon Sep 21 18:03:10 2009 +0200
@@ -319,6 +319,33 @@
         """
         return card in '1?'
 
+    @property
+    def form_needs_multipart(self):
+        """true if the form needs enctype=multipart/form-data"""
+        if super(AutomaticEntityForm, self).form_needs_multipart:
+            return True
+        # take a look at inlined forms to check (recursively) if they
+        # need multipart handling.
+        # XXX: this is very suboptimal because inlined forms will be
+        #      selected / instantiated twice : here and during form rendering.
+        #      Potential solutions:
+        #       -> use subforms for inlined forms to get easiser access
+        #       -> use a simple onload js function to check if there is
+        #          a input type=file in the form
+        #       -> generate the <form> node when the content is rendered
+        #          and we know the correct enctype (formrenderer's w attribute
+        #          is not a StringIO)
+        for rschema, targettypes, role in self.inlined_relations():
+            # inlined forms don't handle multiple target types
+            if len(targettypes) != 1:
+                continue
+            targettype = targettypes[0]
+            if self.should_inline_relation_form(rschema, targettype, role):
+                entity = self.vreg['etypes'].etype_class(targettype)(self.req)
+                subform = self.vreg['forms'].select('edition', self.req, entity=entity)
+                if subform.form_needs_multipart:
+                    return True
+        return False
 
 def etype_relation_field(etype, rtype, role='subject'):
     eschema = AutomaticEntityForm.schema.eschema(etype)

--- a/web/views/basecontrollers.py	Mon Sep 21 18:02:59 2009 +0200
+++ b/web/views/basecontrollers.py	Mon Sep 21 18:03:10 2009 +0200
@@ -213,12 +213,13 @@
     def response(self, domid, status, args, entity):
         callback = str(self.req.form.get('__onsuccess', 'null'))
         errback = str(self.req.form.get('__onfailure', 'null'))
+        cbargs = str(self.req.form.get('__cbargs', 'null'))
         self.req.set_content_type('text/html')
         jsargs = simplejson.dumps((status, args, entity), cls=CubicWebJsonEncoder)
         return """<script type="text/javascript">
  wp = window.parent;
- window.parent.handleFormValidationResponse('%s', %s, %s, %s);
-</script>""" %  (domid, callback, errback, jsargs)
+ window.parent.handleFormValidationResponse('%s', %s, %s, %s, %s);
+</script>""" %  (domid, callback, errback, jsargs, cbargs)
 
     def publish(self, rset=None):
         self.req.json_request = True