Last visit date/time has not updated since RP 3.9 was implemented.
Edit: Also threads marked as read are getting marked as unread again as I read other forums.
These have started happening again. Currently showing "Your last visit was on 08 Jan 2015 12:04." when I had visited between 18:30 and 19:00 (and logged out afterwards).
Edit: The login history confirms this visit, showing a login time of 18:48.
As I have been browsing the forums tonight I have followed my usual procedure of visiting my regular forums one by one, reading new posts in threads that interest me, then marking all threads in the forum read. Later I find that threads that I haven't actually read but have marked as read have returned to showing as unread. Examples include: News, Queensland and Locomotives and Rollingstock.