Maintenance Release Only
Considering there were over 11 million downloads of WordPress 3.0 in just 42 days, they decided to release WordPress 3.0.1 with the following requisite haiku:
Three dot oh dot one
Bug fixes to make you smile
Update your WordPress
The testing many in the WordPress community contributed prior to the release of 3.0 helped make it one of the best and most stable releases they’ve ever had.
Download 3.0.1 or update automatically from the Dashboard > Updates menu in your site’s admin area.
Note: If you downloaded 3.0.1 in the first 20 minutes of release (before 2200 UTC), you’ll want to reinstall it, which you can do right from your Updates screen. Our bad.