Hi Dario!, if you have log messages like:
Warning: db_exec: longdb 10594180 nsdb0 select .... get_sorted_choices ...
get_sorted_choices_with_feedback ....
make sure you have this update:
http://cvs.openacs.org/cvs/openacs-4/packages/assessment/tcl/as-item-type-mc-procs-postgresql.xql?sortby=author&view=log
rev 1.5
Best Regards,