I'm using WP3.8.1 and Weaver II theme.
The site (krawatford.org.uk) has been working fine for some time now but I decided to change the permalink structure to something a little more meaningful that just a post/page id.
So changed it to "postname" and now, apart from my Home page I cannot view any of my pages, I keep getting "page not found". Changed the permalink structure back to default and everything is working fine again.
No other error messages appear.
Can anyone help or explain this?