I know it sounds a bit funny, but that's the real string attached on the latest -Current changelog. It's another RC release, but not RC 4 here we are talking since it's very close to real final version for Slackware 13.37, so Pat decided to put a unique versioning 3.14159265358979323846264338327950288419716 (Pi number)
What's new with this release? Well, it brings another new kernel stock, Linux Kernel 22.214.171.124. A lot of packages has been rebuilt, including glibc (and of course gcc-multilib are ready in AlienBOB's repository). Pat is intending to release 13.37 final with Linux Kernel 126.96.36.199 so we should wait for another week or so, since it's being reviewed by Greg and other Kernel developers.
There has been some changes in basic applications, such as lilo which now use vga=normal as the default choice, updated btrfs-progs to fix problem with fsck at boot time, rebuilt mkinitrd to allow relative path for -s option, rebuilt sysvinit-scripts to open tty1-6 for all runlevels, added Slackware 13.37 mirrors for slackpkg, blacklisted several HTTPS certificates due to Comodo Fraud Incidents, and many other things which are described on the Changelog.
There's one package being added on this batch of update which is idnkit which is used to supports internationalized domain names.
One note about this update is that there is an upgrade to poppler which requires some applications to be rebuilt. If you use any applications that uses/links to Poppler, it's good idea to rebuilt them just in case they stop functioning or missing some functionality.