Hi there Tobias,
in my site: franxiscoflores.info/testresponsiveff
i have margin issue with the text content into the table,
the text content are to close horinzontaly.
You must look to the first tables (tree colums)
what i did was: i returned to the 3.6.1 version, then i upgraded to 3.7 again, and that error disapeer
the only solution for now is to disable the plugin, that is what i did and my feed get validated
