Florian Stoehr wrote:
> 
> You can access this in dvi and pdf format at:
> http://www.florian-stoehr.de/postfix-netbsd.pdf

On page 5, you can cause bash to release its path cache:

$ help hash
hash: hash [-lr] [-p pathname] [-dt] [name ...]
    For each NAME, the full pathname of the command is determined and
    remembered.  If the -p option is supplied, PATHNAME is used as the
    full pathname of NAME, and no path search is performed.  The -r
    option causes the shell to forget all remembered locations.  [...]

Simplest is just "hash -r".  

Other than that, nice writeup.  I learned a few things and might take some
of your advice.  

--jkl