I've added an event that should fire when saving a document type, but it is fired 3 times instead of one! On Umbraco 4.11.1, using the DocumentType objects instead of ContentType, it used to work properly.

This is my code:

using System.Web;
using umbraco.interfaces;
using Umbraco.Core.Models;
using Umbraco.Core.Services;

public class MultiLanguageModule : IApplicationStartupHandler{
    public MultiLanguageModule()
    {
        ContentTypeService.SavedContentType += Test;
    }

    private void Test(IContentTypeService sender, Umbraco.Core.Events.SaveEventArgs e)
    {
        HttpContext.Current.Response.Write("TEST"); //will print TESTTESTTEST, while it should be printed only once.
    }    
}