No matter what I try I cannot add new categories to my blog. I type them in and click ok but nothing new shows in the category list.
Initially I installed wp and then wp-united to integrate a forum into my blog. Since then I have removed the forum and wp-united but feel this may have affected my settings along the line.
Also when clicking 'preview' for a new post I'm writing it says there is no file by that name.
So how can I do a clean install whilst retaining my new theme and posts/settings?