Not sure this is the correct forum section. I just checked Bing Webmaster Tools and for a site they used to have positioned 2-3rd they now say that having 6 H1 tags is wrong and the page should only have 1 - for SEO purposes.
On most pages I have 4-6 <h1> tags for titles and had never considered that having more than one could end up being penalised in a search engine.
Is this just Bing being Bing or is there a serious issue in only using one H1 tag per page?