A link was made to the URL http://www.livejournal.com/talkread.bml?journal=lj_dev&itemid=327797&thread=11444#t11444 which made some weirdness happen... namely, a comment was pulled from the wrong entry and the user it belongs to not noted.
Bearing in mind what's changed in the talk system recently, I can essentially guess what's causing this. The question is, is there some way we can rig it so that URLs made in the last week or so still work properly even though talkids now use anums too?