The
Linux 2.6.27-rc1 kernel was released nine days ago, but replacing that today is the second RC kernel in the 2.6.27 series. The Linux 2.6.27-rc2 kernel has "a lot of random changes" as described by Linus Torvalds himself. Mostly this second release candidate has the usual driver changes as well as updates to the EXT4 and XFS file-systems. The Linux 2.6.27-rc2 release announcement can be read on
LKML.org.