Check the comment for a set maximum length and disapprove it if it's too long.

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This plugin provides flattr-buttons for comments on your blog if the comment author entered a Flattr-ID.

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msHTMLspecialChars - Show all HTML special chars in your comments.

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this plugin allow you to display the number of comments with Arabic grammar

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Adds a template tag to allow you to display only the trackbacks for your posts/pages.

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Imotiv Conversations replaces your WordPress comment system with your comments and conversations on Imotiv.

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Favicon Images for WordPress Comments lets you add favicons next to your blog comments using the site URL of the commentator.

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Best-Of Comments allows users to tag exceptional comments and display a randomly selected list of those comments wherever they choose in their theme.

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