I am running 2.7 and I have a user (Editor) who posts on a daily basis. The problem we are seeing is that neither he nor I can edit most of his posts. When you click on the Edit link or the post Title in the admin area you get this result on the page:
Fatal error: Call to undefined function: normalize_whitespace() in /nfs/c03/h03/mnt/55208/domains/proximitymagazine.com/html/wp-admin/edit-form-advanced.php on line 49
Now, if I use the quick edit option and I either shorten the permalink (I've read elsewhere that 30+ characters in your permalink causes problems) or even if I don't change anything and I click "Update Post"
then the normal editing ability works.
Why, why, why am I getting this? I can't go in and do this work around on every single post!