Over in the issue-tracker thread,
Alvaro Herrera <alvherre(at)2ndquadrant(dot)com> wrote:
> Evidently, the "flat" link is easy to miss. Give it a try.
I submit that the reason people miss what that's for is that it's very
unintuitively named. What about using "whole thread" instead of "flat"?
("flat" is fine as a component of the resulting URL. Just not as the
button label.)
regards, tom lane