Oh wow, that'd be why they don't appear, then. It used to be PR 5 or 6, now it's 0? All the old URLs (/node/<something>) are now redirected to the canonical ones, which is as it should be...

/tutorials/ points to / because I removed the page that was there and linked to them in the sidebar. I have no idea why Google would take the site from 6 PR to 0, wow...