It hasn't even been a week since
Linux 2.6.28-rc1 was released, but due to several prominent bags a second release candidate was issued early by Linux creator Linus Torvalds. The Linux 2.6.28-rc2 kernel fixes non-NCQ (Native Command Queuing) breaking with libata, the work-queue init bug, a struct timeval bug, and an EXT3/EXT4 file-system fix. The release announcement and change-log can be read at
LKML.org.