Bug# slapt-get -u
[...]
# slapt-get --upgrade
[...]
# dotnew-gtk
Traceback (most recent call last):
File "/usr/sbin/dotnew-gtk", line 3, in <module>
import gtk
ImportError: No module named gtk
# slapt-get -i pygtk
[...]
# dotnew-gtk
[ -> works ]


Package dotnew is in CORE, it contains the script dotnew-gtk as well, although pygtk is only in FULL.
I checked both lists in sourceforge svn, XFCE and LXDE package lists for the iso creation.