I downloaded Owen's Limit Categories plugin 1.5.2 from: http://redalt.com/Resources/Plugins/Limit+Categories
Right off I needed to replace
<? in the first line with
<?php to get it "working." Now everything seems to work fine except that the /wp-admin/post.php page comes up completely blank unless the "post to any category" option is selected under options > Limit Cats. This defeats the whole purpose of the plugin. Does anyone have any experience with this plugin, know how to get it working, or know of an alternative plugin?