I've only just realised that my pages aren't showing up in 2.5. It's like the db doesn't recognise them. But I looked at old links and the pages are still there, but they're not listed in the sidebar or within the admin module.
There's a support forum post about it here:
http://wordpress.org/support/topic/1.../2?replies=101
I haven't read all of it but so far the solution is very unappetising: change my permalink structure.
Is anyone else having this issue?