localhost ~ # emerge -pv k3b dbus vlc kdebase-kioslaves avahi hal ivman pmount qt

These are the packages that would be merged, in order:

Calculating dependencies /Traceback (most recent call last):
  File "/usr/bin/emerge", line 4856, in ?
    retval = emerge_main()
  File "/usr/bin/emerge", line 4851, in emerge_main
    myopts, myaction, myfiles, spinner)
  File "/usr/bin/emerge", line 4189, in action_build
    retval, favorites = mydepgraph.select_files(myfiles)
  File "/usr/bin/emerge", line 1227, in select_files
    if not self.validate_blockers():
  File "/usr/bin/emerge", line 1542, in validate_blockers
    slot_atom = "%s:%s" % (portage.dep_getkey(mycpv),
  File "/usr/lib/portage/pym/portage.py", line 4461, in aux_get
    raise KeyError(mycpv)
KeyError: 'sys-apps/dbus-1.0.1-r2'