The remote host is missing an update as announced via advisory SSA:2006-298-01.

https://secure1.securityspace.com/smysecure/catid.html?in=SSA:2006-298-01

New qt packages are available for Slackware 10.0, 10.1, 10.2, and 11.0 to fix a possible security issue. More details about this issue may be found in the Common Vulnerabilities and Exposures (CVE) database: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-4811 Trolltech has put out a press release which may be found here: http://www.trolltech.com/company/newsroom/announcements/press.2006-10-19.5434451733