The remote host is missing an update as announced via advisory SSA:2006-207-02.

https://secure1.securityspace.com/smysecure/catid.html?in=SSA:2006-207-02

New x11 packages are available for Slackware 10.2 and -current to fix security issues. In addition, fontconfig and freetype have been split out from the x11 packages in -current, so if you run -current you'll also need to install those new packages. More details about the issues may be found here: http://lists.freedesktop.org/archives/xorg-announce/2006-June/000100.html http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-1861