RE: how to open directory listing of current buffer ?

[Drew Adams]

> > Or: `M-x dired-jump'.
> 
> I tried that in Gnus (from the buffer displaying your message) and
> I ended up in ~/.w3m - I get that not all buffers have files
> associated with them, but perhaps this should be communicated
> somehow instead of that kind of arbitrary (?) behaviour. Just a
> thought.

Consider filing a bug report: `M-x report-emacs-bug'.

For a starter, the doc string of `dired-jump' says what happens if "in a file" 
or "in Dired", but not what happens otherwise.

Looking at the `dired-jump' code (from a recent 24 Dev snapshot), it seems that 
`default-directory' is used for the otherwise case.  That should at least be 
documented.