Admin all posts display problem

I have a weird display problem in my ‘All Posts’section of the admin area. The actual name of each post is displayed vertically as opposed to across the page horizontally. Each letter of the post name occupies its own line. I have disabled all plugins individually without any change. All Pages is displaying fine. Looks like a css problem maybe? Any help gratefully received.

The page I need help with: [log in to see the link]