The most recent changelog entry includes a security fix for CUPS and other minor updates. Slackware "current" is based on Linux kernel 2.6.24.4, with glibc 2.7 and GCC 4.2.3; it also includes KDE 3.5.9 as the default desktop, a development build of xorg-server 1.5, Firefox 2.0.0.13, Apache web server 2.2.8 and other popular applications.