Found the error; SCSS is not compiling, thus the css is created corrupt (this started to happen long time ago). Possible cause: recent sustitution of the CDN provider, plus the server header: cache-control: public + cache-expire: none, has lead to the real (and damaged) css to be shown.
Merge pull request #49 from julianromera/master

Found the error; SCSS is not compiling, thus the css is created corrupt ...