My users are complaining about the SAME problem.
Its not to do with the accelerator, I tried turning it off.
Go to
http://www.aus-city.com/cgi-bin/ultimatebb.cgi then hit one of the forums, I has the link of:
http://www.aus-city.com/cgi-bin/ultimatebb.cgi?ubb=forum;f=1;hardset=;start_point=;DaysPrune= I have got it set to ALL TOPICS, not only the forum default, but my profile, but only shows topics from last day.