[chrishajer]

More data. Here is the request to add a tag when using FF3:

cookie=bbpress_a2763cd41fe17b461fa952334e00e45c%3Dchrishajer%257C1216783299%257Cb630b90e0e5d52cf8499cfbe58629223&action=add-tag&tag=style.css&id=350&Submit=Add&_wpnonce=bd6cc486c3&_wp_http_referer=%2Ftopic.php%3Fid%3D350&topic_id=350&_=

Here is the same request when using IE7:

tag=style.css&id=354&Submit=Add

FF3 works, IE7 does not.