WordPress.org

Normalize URLs makes WordPress to play more nicely regarding URLs in HTTP Requests. Dual Mode Plugin, can be used as a standard Plugin or as a Must-Use Plugin.

Features

• Fixes various problems at once.
• Makes your blog more compatible with HTTP, the protocol for any Website.
• Full HTTP 1.0/1.1 compliance.
• No need for you to wait for core updates.
• Even 3.0.1 will not fix all of the problems this plugin fixes.
• Free.

Background

URLs as resource locating URIs can be written in many different ways to describe the exact same location. The Normalize URLs Plugin ensures that WordPress plays more nicely with URIs/URLs as discussed in RFC 3986 (URI) and RFC 2616 (HTTP).

Uniform Resource Identifier (URI): Generic Syntax
http://tools.ietf.org/html/rfc3986

Hypertext Transfer Protocol -- HTTP/1.1
http://tools.ietf.org/html/rfc2616