Get plugger.
http://fredrik.hubbe.net/plugger.html
Here is a list of mime types it supports. PNG is on there, along
with WAV, MIDI, MPEG, MP3, and a shitload of others.
It will make your web browsing in Linux as good as it is with
Windows. (Would be better except Netscape crashes a lot :-)
audio/x-mpegurl
audio/x-mpeg-url
audio/mpeg-url
image/x-sun-raster
image/sun-raster
image/x-png
image/png
image/x-tiff
image/tiff
audio/x-wav
audio/wav
audio/x-basic
audio/basic
audio/x-psid
audio/psid
audio/x-sidtune
audio/x-mpeg
audio/mpeg
audio/x-mpeg3
audio/mpeg3
audio/x-mpeg
audio/mpeg2
audio/x-mod
audio/mod
audio/midi
video/x-fli
video/fli
video/x-msvideo
video/msvideo
video/x-anim
video/anim
video/x-sgi-mov
video/sgi-movie
video/x-dl
video/x-mpeg
video/mpeg
Dan