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- To verify that this will not be a SEO problem, check the HTML source code of both pages (with the dot and dash spelling). If they contain
<link rel="canonical" href="http://domain/slug"> tags that aren’t different from each other, it will not cause a duplicate content problem, as robots will consider this to be two different spellings of the same page, rather than two separate pages.
- WordPress slugs do not support dots (.) by default, they are filtered out and replaced with dashes (-) by
sanitize_title_with_dashes(). You can however employ your own filter instead (such as this one by Andy) or use a plugin that does this for you.
