WordPress has released version 2.2.1. This is a required update for those using version 2.2. It patches bugs in version 2.2 and fixes numerous security issues.

Some bugs reported to be fixed:

  • ATOM feed validation fixes
  • XML-RPC fixes
  • Widget backward compatibility fixes
  • Widget layout fixes for Internet Explorer 7
  • Page and Text Widget improvements

Numerous security vulnerabilities are also addressed:

  • Remote shell injection in PHPMailer
  • Remote SQL injection in XML-RPC
  • Unescaped attribute in default theme

The detailed instructions for upgrading your Wordpress can be found here.

You might also be interested in reading my experience upgrading from WordPress 1.5 to 2.1

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