You know how you didn’t really get your fill of WordPress updatin’ a couple of weeks ago? No worries, because WordPress 3.4.1[ref]And technically 3.3.3, if you’re silly and still on the 3.3 branch.[/ref] is available immediately. This release is a maintenance/security fix that will clear up a handful of small bugs discovered in 3.4 as well as a multisite security issue the WordPress security team both discovered and fixed.
Core developer Andrew Nacin broke the news on the WordPress news blog just a few minutes ago and listed all the noteworthy changes, so head over there if you’re curious about what’s changed. Either way, though — go get your site(s) updated right away!