The UBB uses plain text files to store all its data.
To avoid having to open and reach each of those files to generate the topic listing page, we use a number of metadata files that store thread information. These are the forum_thread_data_*.cgi and forum_*.cgi files inside the noncgi/Forum* directories.
The rebuild stat files function regenerates the metadata files, which usually gets rid of odd little quirks like the one you had.
Generally, you don't need to do any maintenance to keep things running smoothly, except perhaps to rebuild the search indexes from time to time.
[ 01-08-2002 06:15 PM: Message edited by: Charles Capps ]