I also run the latest Dapper Xubuntu (i368 / 686-smp kernel) packages, and can confirm excessive memory usage over time with the xfdesktop package. My symptoms seem exactly as described above.
-- XFce heap not purging https://launchpad.net/bugs/59924 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
