Hi,Yesterday i did an installation with debian-i386-6.0.3 and i got, as usual, 'tasksel' in which i selected Desktop task to install and it went OK (as usual).
If you provide the installation log from the installation with problems maybe someone can take a look. To be honest, in dozens of installations i never seen the problem you initially report.
-- Melhores cumprimentos/Best regards, Miguel Figueiredo