Strict Permalinks does two things:
post_name portion of the permalink to alphanumerics and hyphensLike me, you may have been under the impression that post "slugs" are already restricted to alphanumerics and hyphens. In the current WordPress 2.8.5, a title that includes typographically-correct punctuation (a.k.a. "smartquotes") will result in URL-encoded characters in the post_name field. Many browsers handle this oddity seamlessly, however this may cause difficulties when integrating with systems expecting a more limited URL syntax.




