More Iceweasel strangeness

["Dennis G. Wicks" <wix@eskimo.com>]

Greetings;

Very often when I click on a link on a web page
or in an email Iceweasel will give me a 404 that
purports to be from the server on the remote host.

But, if I paste the same url into Opera it pops
right up with the page. Then if I go back to
Iceweasel and click the GO button or do a refresh
I still get a 404!

If I let it "age" for a few minutes (I haven't
timed how long exactly.) Iceweasel will give
me the page.

Any ideas?

(etch, gnome, Iceweasel, all latest versions.)

TIA!
Dennis