Index: app/controllers/account_controller.rb
===================================================================
--- app/controllers/account_controller.rb	(revision 9291)
+++ app/controllers/account_controller.rb	(working copy)
@@ -60,7 +60,7 @@
       return
     else
       if request.post?
-        user = User.find_by_mail(params[:mail])
+        user = User.find_by_mail(params[:mail].strip!)
         # user not found in db
         (flash.now[:error] = l(:notice_account_unknown_email); return) unless user
         # user uses an external authentification