Found a little bug connected with option:
ChatBox always collapsed by default (ChatBox Full not affected)
When it is set to "Yes"
and you open the main forum's page
the collapse button showen is

(
collapse_tcat.gif)
But must be showen

(
collapse_tcat_collapsed.gif)
P.S. A little question about "Auto-prune setting".
Prune in this mode means delete?
So the message will be fully deleted if auto-pruned?