Topic title changed a bit so I can fit other changed stuff into this topic too.
I was bored at work so I decided to try do some optimization on HLP, mainly the forums.
Recent Posts on forum index has been disabled because it becomes increasingly ineffective in terms of sql-queries the more membergroups a forum has, and we have nearly 50. Calendar also causes some unnecessary sql-queries so it has been disabled for guests.
Also testing new caching settings that are in place for all urls that begin with (www.)hard-light.net/, does not affect subdomains. While I still had 30 minutes of work left, I began pondering whether I should hide post counts for good or not. While pondering 20 minutes had passed so I'm preparing to leave instead.

Edit: If you miss the Recent Posts, don't forget you still have the link "View the most recent posts on the forum." at bottom of the forum index, "Show unread posts since last visit." and "Show new replies to your posts." at top.