This post mentioned that many people are getting "Error : You must be logged in or using a username/password to reply to this protected entry" when posting a reply from within their e-mail program. This was dismissed as a problem with various e-mail clients. However, I'm now thinking it's a quirk on the servers because when I replied to dormando's post in lj_maintenance (http://www.livejournal.com/talkread.bml?itemid=15190501&thread=19729599#t19729599) from within IE it gave me the same error. All I had to do was resubmit it. I'm guessing the problem is being caused by something else (for example, a problem getting the item or user), but the other errors aren't being shown because the line (107 of talkpost_do.bml) that produces that error simply returns the error string instead of pushing the error to @errors as it should. LJ::bad_input (line 159) doesn't even get a chance to spit out the errors in @errors. Changing this should shed light on why this problem is happening.