dphiffer

<p>Strict Permalinks does two things:</p>
<ol>
<li>Restricts the <code>post_name</code> portion of the permalink to alphanumerics and hyphens</li>
<li>Disables permalink editing once a post is published</li>
</ol>
<p>Like 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 certain kinds of punctuation (e.g., “smartquotes”) will result in URL-encoded characters in the <code>post_name</code> field. Many browsers handle this oddity seamlessly, however this may cause difficulties when integrating with systems expecting a more limited URL syntax.</p>
<h3>Upgrade</h3>
<ol>
<li>Use the plugin updater in WordPress or…</li>
<li>Delete the previous <code>strict-permalinks</code> folder from the <code>/wp-content/plugins/</code> directory</li>
<li>Upload the new <code>strict-permalinks</code> folder to the <code>/wp-content/plugins/</code> directory</li>
</ol>
<h3>Usage</h3>
<ol>
<li>In all cases the <code>post_title</code> to <code>post_name</code> conversion (i.e., the <code>sanitize_title</code> filter) will be limited to a-z, 0-9 and hyphens (-).</li>
<li>If a post is not yet published, the permalink can be edited as usual.</li>
<li>Once a post is published, the permalink editing interface is disabled.</li>
</ol>


Strict Permalinks

Restricts permalink syntax and disables permalink editing after a post is published.

antithesisgr

<p>This plugin allows you to use longer URLs (permalinks), by allowing much more characters in your titles and slug. The important is that this is done in a way that is future compatible with WordPress core updates.<br />
There is a 200 characters limitation on WordPress core nowadays and this limit is raised to 3000 with the plugin.<br />
Plugin is always extending the current WordPress core code – your long URLs will work even after WordPress core updates.<br />
This plugin is really useful especially in non-latin slugs because of the required url escaping that increases the length of your permalinks a lot.</p>
<h4>Features</h4>
<ul>
<li>Upon activation the available slug length (post title) will become 3000, allowing long permalinks.</li>
<li>Required functionality is automatically applied without changing WordPress core files.</li>
<li>Even after core updates, plugin will automatically apply required changes and just keep your long URLs working.</li>
<li>Plugin requires at least MySQL 5.0.3</li>
</ul>


Longer Permalinks

Excellent plugin

Allow long permalinks in your WordPress. Useful especially for using non-latin characters in permalinks.  Respects future relevant core updates.

Strict Permalinks vs Longer Permalinks