Drupal 7 alpha3 released

This time again there were some really critical bugs in alpha2, like in some conditions passwords were saving in plain text, so after some time we now have the alpha3!
Changes since DRUPAL-7-0-ALPHA2:

• Drupal 7 now ships with jQuery 1.4.2 and jQuery UI 1.8.
• API change: AJAX commands are now defined as array('#type' => 'ajax', '#commands' => $output) rather than array('#type' => 'ajax_commands', '#ajax_commands' => $output).
• API change: There is a new form element #type 'text_format', should be used for textareas with format selectors (e.g. body fields).
• page--front.tpl.php works again.
• Bug where IE quits displaying any CSS after 31+ stylesheets now fixed.
• The "Add" link now shows up for blocks. :P
• Now, running drupal_execute() multiple times on forms will validate each time, instead of only the first one.
• UI for translatable fields removed, in favour of contributed module.
• MAINTAINERS.txt now actually approximates the truth.
• Numerous upgrade path fixes.
• Numerous documentation fixes and documentation holes filled.
• Numerous markup fixes and improvements.
• Various performance improvements, especially around data import.
• Numerous security fixes, including both forward-ports of 6.x holes and plugging a D7-only one where Drupal 7 was storing plain-text copies of passwords in user.data under certain conditions.