Google Webmaster Tools (GWT) flagged this error on my client's responsive website. The errors exclusively appear on pages with large tables of data. The developers took a quick look and weren't able to determine identify any CSS that might be causing the issues. The page doesn't have any horizontal scrolling and we feel we are adhering to Google's guidelines (and the author's relevant blog post).

Has anyone had a similar experience ? How did you resolve the issue?


The robots.txt file has to allow access to the CSS files, otherwise Google cannot evaluate mobile usability.

This would have been picked up automatically if Google's call-to-actions were to the Mobile Friendly tool instead of the PageSpeed Insight tool: https://www.google.co.uk/webmasters/tools/mobile-friendly/

Please see Google's webmaster guidelines for more information: https://support.google.com/webmasters/answer/35769

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