The "Desktop environment" task is broken on non-i386/powerc machines because of kdegraphics:
kdegraphics: Depends: kamera (>= 4:3.2.3-1.1) which is a virtual package. Depends: kcoloredit (>= 4:3.2.3-1.1) which is a virtual package. Depends: kdegraphics-kfile-plugins (>= 4:3.2.3-1.1) which is a virtual package. Depends: kdvi (>= 4:3.2.3-1.1) which is a virtual package. Depends: kfax (>= 4:3.2.3-1.1) which is a virtual package. Depends: kgamma (>= 4:3.2.3-1.1) which is a virtual package. Depends: kghostview (>= 4:3.2.3-1.1) which is a virtual package. Depends: kiconedit (>= 4:3.2.3-1.1) which is a virtual package. Depends: kmrml (>= 4:3.2.3-1.1) which is a virtual package. Depends: kooka (>= 4:3.2.3-1.1) which is a virtual package. Depends: kpaint (>= 4:3.2.3-1.1) which is a virtual package. Depends: kpdf (>= 4:3.2.3-1.1) which is a virtual package. Depends: kpovmodeler (>= 4:3.2.3-1.1) which is a virtual package. Depends: kruler (>= 4:3.2.3-1.1) which is a virtual package. Depends: ksnapshot (>= 4:3.2.3-1.1) which is a virtual package. Depends: ksvg (>= 4:3.2.3-1.1) which is a virtual package. Depends: kuickshow (>= 4:3.2.3-1.1) which is a virtual package. Depends: kview (>= 4:3.2.3-1.1) which is a virtual package. Depends: kviewshell (>= 4:3.2.3-1.1) which is a virtual package. Depends: libkscan1 (>= 4:3.2.3-1.1) which is a virtual package. tasksel: aptitude failed -- Martin Michlmayr http://www.cyrius.com/