It almost seems like I shouldn't jinx it, but I finally found how to fix the bug with not being able to edit comments you make on a forum thread.
Unfortunately the fix involved disabling the module that provided the quote button, but that was pretty useless anyway as it copied the entire parent post and you had to do a bunch of cutting anyway. So for now to quote a post to which you are replying, you'll just have to copy and past the line(s) by hand. Sorry about that, but so worth it to get editing!
*Former* Website Administrator, C36/375IA
*Former* owner, C36 tr/fk #255, Santa Barbara, CA