Source code 3 Rows whitespace

I am not sure where this is coming from, but it seems that in my source code there are 3 white space rows above the generated code output of everything from templates to xml.

I have checked for

  • plugins
  • browser addons
  • tried different browsers because of addons
  • checked templates
  • even if i dump&die something above the kirby render code…
  • checked for whitespace at the end of includes

anyone has an idea?

since those white space are generated, things like xml sitemap fail…

found it, there was indeed some whitespace…