Recently I upgraded from WP 2.9.2 to 3.0 and since then I can't change post's author, bacause WP doesn't display "Authors" dropdown menu anymore... I run website with many contributors, so it's very important for me to have a possibility to choose the author of post.
Is this caused by merging single user WP with WP MU since WP 3.0? Is there any solution to that problem? Any help will be appreciated :)