Fairly standard, I think.
On the posting page for that post I turned off everything except "Convert Newlines to BR Tags". But it didn't matter to the behavior.
In my Prefernces I have everything checked through "Show Forums with New Posts Only". The next 2 (Invert... and Nadsat) are not checked.
For completeness:
Indents are spaces, Heirarchy is after the post body, Georgia font, Split Links, Image Inline, EDT, 10 threads per page, Forum Control Links on top.
Thanks for checking into this.
Cheers,
Scott.