can't post with vim

I'm running slrn 0.9.8.1pl1-28 and vim 1:7.1-138+1ubuntu3 on ubuntu 
8.04. When I try to reply or follow up to a newsgroup article I get an 
error message that the editor has returned a non-zero status. This only 
happens in slrn. When I call vim to edit a file everything is normal. My 
slrn.rc file looks like this:

% Set your favourite editor.  Use %s for the file name and %d for the line
% where the cursor should be placed (usually at the beginning of the 
body).
set editor_command "vim '%s' %d -tmp"

Found some references to this problem by googling but they were no help.

Does anyone have an idea what's going on?

-- 
Bob Holtzman
"If you think you're getting free lunch,
  check the price of the beer"

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