WordPress 2.7.1 RC1 has been released, which comes with following fixes: URL column in Edit Links removes www. from domains that end in www; Theme preview fails when theme in subdirectory; ‘Draft Saved’ current_time not reflecting timezone setting in the edit area; Revisions do not respect time zone offset; Canonical redirect of feed URLs with suffixes is wrong; index.php file in the plugins folder makes the Dashboard fail

If you’re interested, you can download WordPress 2.7.1 RC1 or click upgrade in the settings menu, if your already running WordPress 2.7 for auto upgradation. If you find bugs, you can report the wp-testers list.