Ok, looks like I’m using 1.3.2 version of WP MU. I’m running a controlled MU with just a few trusted users. I really need to allow class attributes, so I created a kses.php file with the lines above in it, and uploaded it to mu-plugins/kses.php as instructed. However, that causes those lines to be written at the top of the admin (as though they were an error). Is that because I’m running 1.3.2 instead of 1.2.5? I’ve gone through all of the forum posts regarding kses, and have seen many people get a little rude, implying that reading such posts will provide the answers, but frankly, it’s just not the case (at least not for me). I’ve tried the various “solutions” to no avail. Has anyone come up with a simple answer to this? Like a plugin?