It seems that the sort direction 'ascending' and 'descending' in the forum control panel is swapped. I check the language strings of viewboard.php and it look correct. I run this query to set all my boards to descending:
Code
update ubbt_FORUMS
set FORUM_SORT_FIELD = 'last', FORUM_SORT_DIR = 'des'
If I check the the control panel all forums show 'ascending' sort direction.
I can change it in the CP and it take effect. It is a new feature in 7.5 that you be able to set the sorting for each forum. If your settings dont saved take a look at the ubbt_FORUMS table and check for the 2 new fields for the sorting order. Maybe your setup miss it. Do you run the installer while upgrading the forum? It insert 2 needed fields in the table.
maybe but it dont work. Any setting from CP is ignored and change my data to ascending. There must be another bug in it. I change all setting now direct in the table to be sure to set all my forums to last posting descending. If I dont touch the forum settings in the CP all is fine - for now.