rdesktop -K switch doesn't work

[nanaya]

Binary package hint: rdesktop

Description: Ubuntu 10.04 LTS
Release: 10.04

rdesktop:
  Installed: 1.6.0-2ubuntu3
  Candidate: 1.6.0-2ubuntu3
  Version table:
 *** 1.6.0-2ubuntu3 0
        500 http://dl2.foss-id.web.id/ubuntu/ lucid/main Packages
        100 /var/lib/dpkg/status

- using -K to keep desktop shortcut binding (ie alt-tab to switch program)

- the keys still bind by the remote desktop session (alt-tab shows remote desktop (windows)'s app-switcher)

Then I tried manually compiled rdesktop and -K works as expected.