can't go to certain web sites?

[Andy Wettstein <awettstein@cait.org>]

Here's a weird one.  I've got a friend using Debian on ultra 5, but he
can't access certain web sites.  Notably www.sun.com, but he can access
several other sites sites.  He has tried mozilla, opera, konqueror, and 
lynx and all of them have the same problems.  They just sit there and 
time out after a while.  The only thing I see that is odd is that on a 
dmesg there are lines and lines of this:

hw tcp v4 csum failed

Has anyone else had a problem like this?  This doesn't seem normal.

later
andy