This bug is fixed in kde 3.5.4 (already in Edgy, available as kubuntu.org package for Dapper). Not sure if there is a plan to backport 3.5.4 or just this fix for Dapper.
-- IP address validation functions incorrectly https://launchpad.net/bugs/56932 -- kubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs
