diff --git a/app/controllers/apps_controller.rb b/app/controllers/apps_controller.rb
index 6cdd8c5..ffbadbe 100644
--- a/app/controllers/apps_controller.rb
+++ b/app/controllers/apps_controller.rb
@@ -1,6 +1,7 @@
 class AppsController < InheritedResources::Base
   before_filter :require_admin!, :except => [:index, :show]
   before_filter :parse_email_at_notices_or_set_default, :only => [:create, :update]
+  before_filter :parse_notice_at_notices_or_set_default, :only => [:create, :update]
   respond_to :html
 
   def show
@@ -105,5 +106,20 @@ class AppsController < InheritedResources::Base
         end
       end
     end
+
+    def parse_notice_at_notices_or_set_default
+      if params[:app][:notification_service_attributes] && val = params[:app][:notification_service_attributes][:notify_at_notices]
+        # Sanitize negative values, split on comma,
+        # strip, parse as integer, remove all '0's.
+        # If empty, set as default and show an error message.
+        notify_at_notices = val.gsub(/-\d+/,"").split(",").map{|v| v.strip.to_i }
+        if notify_at_notices.any?
+          params[:app][:notification_service_attributes][:notify_at_notices] = notify_at_notices
+        else
+          default_array = params[:app][:notification_service_attributes][:notify_at_notices] = Errbit::Config.notify_at_notices
+          flash[:error] = "Couldn't parse your notification frequency. Value was reset to default (#{default_array.join(', ')})."
+        end
+      end
+    end
 end
 
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libgit2 0.21.2