I have just freshly installed a new version of WordPress downloaded from this website. I have been struggling with this problem for sometime now. I can not: delete posts/comments/pages/categories and create categories. I have tried everything I can think of, from installing older versions, to copying existing wordpress installs from other of my sites and just changing the basic stuff in the DB info and still will not work.
Here is an image of what happens:
Thanks for the help.