Just replace this:

function add_tags_textinput() {
	global $postdata;
	$tags = get_post_meta($postdata->ID, 'tags', true);

with this:

function add_tags_textinput() {
	global $post_ID;
	$tags = get_post_meta($post_ID, 'tags', true);

The problem is that it will show existing tags, or let you add a new tag, but it will lose tags when you edit a post. It’s not able to retrieve the tags to fill in the form field, apparently because $postdata isn’t returning the ID it expects.

I’ve submitted the fix to wp-plugins.org, so if the author is keeping track of tickets there, the fix should show up in the next version of the plugin.

Update Jan. 3: The plugin author has released version 0.5 with a slightly different fix (plus a few other improvements), and it’s now compatible with WordPress 2.0.

Good grief, people—you can pick up the book for $7.00 at any bookstore. I can understand posting a couple of excerpts, but from what I can tell, these people have scanned and posted the entire book. They haven’t even credited the source! In the blog postings that show up on a “bunny suicides” search, most of them don’t even seem to know where the cartoons are from. Heck, even with pirated MP3s you usually know who sang the song.

Google has pulled a few of the sites from their index in response to a DMCA complaint. (Interestingly, Google themselves linked to the Chilling Effects entry.)

It always amazes me how rude people can be.