The WP Unformatted plugin allows you to remove WordPress’s smart quotes (texturize) and auto XHTML tags (autop) functionality on a per-post basis.
To disable auto-formatting on a post, add a custom field ‘sponge’ with a value of ‘1’ to the post.
To disable auto-smart-quotes on a post, add a custom field ‘sandpaper’ with a value of ‘1’ to the post.
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