Gnus: How to save *all* attachments at once [gnus-summary-save-parts]?

[Marius Hofert]

Hi,

If I use "X m" to save (all) email attachments, I am first asked "Save parts of 
type: image/.*" and then in which folder to save the attachments. I would like 
to adjust these settings to save some typing. My goal is to set the default so 
that attachments are saved in ~/Downloads and that _all_ attachments are saved 
on this single key combination (X m). 

I managed to set the directory to ~/Downloads via
(setq gnus-summary-save-parts-last-directory "~/Downloads")

To save _all_ attachments by default, I put in .gnus.el:
(setq gnus-summary-save-parts "*.*")
However, I'm stil asked for image/.*. How can I specify to save all attachments 
at once [not only images]? 

Is there already a simpler key combination for saving all attachments? I found 
"K a" (which is intuitive since "K o" saves particular attachments) but it 
didn't save anything. 

Please note that I first posted this on 
http://lists.gnu.org/archive/html/help-gnu-emacs/2011-11/msg00356.html not 
knowing that there is a special Gnus list for such questions.

Cheers,

Marius