links doesn't correctly handle .jpg and .png image files.

When asked to display a .gif image, links correctly offers a 'Open' option in its menu, then calling run-mailcap.
There's no way to display .png or .jpg files though, menu options are just 'Save' or 'Display'.

Here are my config files:

/etc/links.cfg

# This file is automatically generated by Links -- please do not edit.
async_dns 1
download_utime 0
max_connections 10
max_connections_to_host 2
retries 3
receive_timeout 120
unrestartable_receive_timeout 600
format_cache_size 5
memory_cache_size 1M
http_proxy ""
ftp_proxy ""
download_dir ""
language "English"
http_bugs.http10 0
http_bugs.allow_blacklist 1
http_bugs.bug_302_redirect 0
http_bugs.bug_post_no_keepalive 0
ftp.anonymous_password "links-user@debian.org"
terminal "linux" 2 1 5 ISO-8859-1
#association "GIF image" "image/gif" "zgv %" 23 1
mailto "mutt %" 1
telnet "telnet %" 1
tn3270 "telnet %" 1


~/.links/links.cfg

async_dns 1
download_utime 0
max_connections 10
max_connections_to_host 2
retries 3
receive_timeout 120
unrestartable_receive_timeout 600
format_cache_size 20
memory_cache_size 5000k
#http_proxy "proxy2.etsit.upm.es"
http_proxy "proxy.andago.net"
ftp_proxy ""
download_dir ""
language "French"
http_bugs.http10 0
http_bugs.allow_blacklist 1
http_bugs.bug_302_redirect 0
http_bugs.bug_post_no_keepalive 0
ftp.anonymous_password "bgates@microsoft.com"
terminal "linux" 2 1 5 ISO-8859-1
#extension "GIF image" "image/gif" "zgv %" 23 1
#association "JPEG image" "image/jpeg" "fbi %" 16 1
mailto "mutt %" 1
telnet "telnet %" 1
tn3270 "telnet %" 1
--- Begin /etc/links.cfg (modified conffile)
async_dns 1
download_utime 0
max_connections 10
max_connections_to_host 2
retries 3
receive_timeout 120
unrestartable_receive_timeout 600
format_cache_size 5
memory_cache_size 1M
http_proxy ""
ftp_proxy ""
download_dir ""
language "English"
http_bugs.http10 0
http_bugs.allow_blacklist 1
http_bugs.bug_302_redirect 0
http_bugs.bug_post_no_keepalive 0
ftp.anonymous_password "links-user@debian.org"
terminal "linux" 2 1 5 ISO-8859-1
mailto "mutt %" 1
telnet "telnet %" 1
tn3270 "telnet %" 1

--- End /etc/links.cfg