[EricH]

2008 and before, you'd get the following: AAAAAAAAAAAAAAAAAAAAAAAAAAAAAA...AAAAAAAAAAAAA

He likes to have a little blank space at the end of his posts, but the site won't let him unless there's text there, so he puts the trailing dot (or trailing Morse). The trailing Morse only started this fall.

As for the other posts, there are some hidden forums on CD, and my guess is that Dave posted in those. This would account for those posts not showing up. There is also a decent chance that none of those posts have anything trailing, as they wouldn't cause maximum confusion.