>>>>> In <9602061937.AA0696@mortgage.berkeley.edu> 
>>>>>	Richard Stanton <stanton@haas.berkeley.edu> wrote:

Richard> It seems that playing with variables like
Richard> gnus-visible-headers makes quite a lot of difference to gnus'
Richard> toggling behavior, and I'm wondering if maybe all my problems
Richard> are just due to my not setting up sgnus/tm properly.

  I changed about header toggling. Because September Gnus already does 
not delete regions in header when pressing `t' so tm-gnus can use
original function. For `W t' it deletes regions so tm-gnus uses
`tm-gnus/summary-toggle-header' instead of
`gnus-summary-toggle-header'.

  Please try following: