As a service to those who still wish to use superseded rulesets, and as a bit of fun/historical interest, this thread is dedicated to providing errata for out-of-print products (which have often been outright replaced by newer products designed for that purpose).
I heartily encourage anyone who has any further official errata appropriate for this thread to post about it in the stickied Errata General Discussion thread, so that I can add to the collection (as always, this being an errata thread, there is no discussion permitted here). Whenever applicable, scans rather than transcriptions are preferred if possible.
NOTE: every product featured herein is no longer in print! This means that, for the most part, there shouldn't be Ask The Devs threads made about the rules found in this stuff (background info is still fair game, although the older the book, the less likely you are to get an answer). Some of the rulesets -- those that are out of print, but that have never been replaced -- you may ask questions about in the
Supplementary Rules forum.
In case of any contradiction between any item featured here and more recent rules, the more recent rules take 100% precedence.