It has been announced many times and discussed in depth, but you may have not realized that the "standard" style on openstreetmap.org is changing significantly today.
Not everybody is going to be happy, but it has been obvious for a longer time that the style, as it was, designed for a low data density OpenStreetMap, had to change to continue to be useful in the future. The main and most noticeable changes affect the road rendering and are the result of a google summer of code project.
For more information see https://blog.openstreetmap.org/2015/10/30/openstreetmap-org-map-changing/