workaround per pesante warning emesso da advanced forum quando si ordinava le viste con gli appositi tab

sembra si tratti dell'effetto di un bug di views3 e non di advforum

ho corretto secondo quanto suggerito qua: http://drupal.org/node/715740#comment-3474170

e precisamente:

I edited four of the views: advanced_forum_active_topics, advanced_forum_group_topic_list, advanced_forum_new_topics, and advanced_forum_topic_list. (All the Advanced Forum views except advanced_forum_unanswered_topics.)

For each view:

• I edited the default display of the View.
• In the Style settings section, clicked the "gear" next to Style: Forum topic list to change the settings.
• Then in the Defaults: Style options list, I unticked the Sortable column in the Last post field row.
• And changed the Default sort to one of the other fields.