mailcap problems

[Jessica Perry Hekman <jphekman@xxxxxxxxxxxx>]

I am in the process of switching to mutt from pine. I'm having trouble 
viewing jpeg attachments; when I try, mutt complains

 mailcap entry for type image/jpeg not found

In my /etc/mailcap file I see:

 image/*; eog %s

and in my .muttrc, just to make things really clear, I added

 set mailcap_path=/etc/mailcap

and then I also tried

 set mailcap_path=~/.mutt_mailcap

and copied the contents of /etc/mailcap there. None of these things 
worked; the error message didn't change.

I've done web searches, and found people with similar complaints, but 
their issues all seemed to end up being somewhat different (problems with 
mutt interfacing with pdf readers and like that).

Can anyone help me? (Fedora Core 1, mutt 1.4.1i.)

Thanks,
Jessica