Same here using 4.9.1 - didn't used to do that
I know it's only a warning, but I think it's a wrong warning since I think it's allowed by the CSS gods
From the 'detailed description' link
Quote:
Headings should only be defined once
Object-Oriented CSS (OOCSS) works by defining reusable objects that can be put into place anywhere on a site and appear exactly the same. The heading elements (h1-h6) are considered to be built-in objects that should look the same regardless of where they appear. As such, each heading should have exactly one rule defining its appearance. Multiple rules defining the same heading appearance can lead to objects that are hard to use because the context defines the appearance rather than being completely atomic.
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