Release Notes: Please see the changelog for a complete list.
Release Notes: This version includes ReiserFS fixes, ISDN cleanups, PPC update, UDF update, System V FS update, ARM update, USB driver updates, ACPI update, smbfs update, devfs update, network driver updates, and lots more.
Release Notes: Lots of cleanups and bugfixes. Please see the Changelog for details.
Release Notes: The biggest real changes that impact normal users are the two bugs that could corrupt your harddisk. The IDE driver bug that Russell found has, to Linus' knowledge, never been shown to happen on anything but his ARM machine, but for all we know it could be quite bad even on x86. Similarly, the elevator bug could cause corruption, but probably has not actually bit people in practice. But both are definitely deadly at least in theory even on bog-standard common PC hardware. The reiserfs fix should hopefully make the "null bytes in log-files" problem a non-issue, and along with the smbfs/HIGHMEM thing it is certainly important for those that it can affect. For additional details follow the changelog link.
Release Notes: New architecture (cris), arm and mips updates, major IDE driver fixes, elevator fixes, and fixes to raw IO mode.