Right now it looks like the cookie that determines which posts are marked as still-unread is set up to expire in like five minutes, resetting every time I go to a new page. This is annoying. I'm tired of taking so long to write a post or read through a page of a thread that the cookie times out and now my red-paper icons are gone. Can we set it to use session cookies instead, so that it doesn't expire until I close the tab or leave the site?