The seventh alpha of Drupal 7 has been released

The seventh alpha release of what will become Drupal 7 has been announced.From the announcement:

We have identified several “beta blocking” issues, and itemized these at the Drupal core community initiatives page. It's expected we will have a few beta versions and at least one release candidate before Drupal 7.0 is finalized. We can potentially reach beta within the next month by focusing on this short-list of issues!

This release includes:

• HUGE number of upgrade path fixes, including automated tests for updates. We are *very* close to a totally working upgrade path! Please test!
• Great usability improvements, including the installer not greeing you with a red error of death anymore on shared hosts!
• Field UI improvements to allow it to be further extended from contrib.
• Numerous Form API fixes and improvements.
• Numerous accessibility fixes.
• A variety of PostgreSQL and SQLite fixes, almost at 100% automated tests passing on both!
• Lots of polish on coding standards compliance and API documentation.
• Markup improvements, and a new default jQuery UI theme.
• Numerous security fixes, including ‘forward-ports' of Drupal core SAs, and fixes to private files.
• Performance improvements.
• There have been several API changes since alpha6 to fix critical issues.

Learn more: http://drupal.org/drupal-7.0-alpha7