Microsoft quietly rolled out an automatic update late Tuesday for Beta testers of Windows 7 RC.
Included were 3 'test updates' and 1 update for the compatibility view in Internet Explorer 8.
In addition, a host of new Windows 7 language packs were released (as optional) and can be downloaded by visiting Windows Update.
Note: Depending on your settings, you may already have them or need to visit Windows update for the IE8 patch.
More on the Windows 7 RC (which is still available for download) can be found here.