No, you only need to reindex once. Once you switch the indexing, Gossamer Forum immediately starts updating the index for any new or updated posts. Reindexing is needed to add all the existing post data into the index - once they are indexed, everything is kept up to date automatically.
Jason Rhinelander
Gossamer Threads
jason@gossamer-threads.com
Jason Rhinelander
Gossamer Threads
jason@gossamer-threads.com