The same thing happened to me awhile back with
Taro. All of a sudden I couldn't see any of the
images. I thought Taro was broke until he did a
massive Tenchi update & I still couldn't see a
thing. No telling what I missed out on. I traced
it down to Taro wanting a refferer header to
ensure you were viewing the images from Taro's web
page and not from an off-site link. I was using
Junk Busters and had referrer turned off. As soon
as I enabled it for Taro the pictures came back.
  If you're using some type of filtering software
disable it and see what happens. It might not help
though cause I just now enabled every filter I
could think of and I'm still getting pictures from
Animanga. So as far as I can tell the only thing
the server knows about me now is my browser type &
my IP address.
 So two possibilities ... 1.) Perhaps someone with
the same ISP as you has been doing not-nice
things, and Yann is blocking the whole domain. Or
2.) The server detects Internet Explorer Ver 5 and
uses some nifty neetoey new feature that confuses
IE.

Solutions .... 1.) Temporarily switch to one of
those free ISP's and see what happens. If it
works, contact Yann and convince him it wasn't
you. Or 2.) Switch to Netscape and see what
happens. If it works or not, stick with Netscape.