<A target="_blank" href="http://www.badkey.com/db/blogsphere.nsf/d6plinks/JWIE-7N9SPT">After upgrading to Domino 8.5, John Willemse</A> noticed a change in the default settings for the Notes.ini parameter DEBUG_PD_NAGLE_OFF. This change may, or may not, affect your installation. John provides more information.