The following site makes Netscape (4.75-0.6.2) behave pretty weird, the site looks very bad and after visting the site returning to other sites doesn't solve the problem (black screens), you have to restart it: http://www.debus.sbsnet.nl/
That site does look pretty awful, although I don't see any aftereffects of visiting it here. Unfortunately, as the problem viewing it seems to be in Netscape's html rendering (and possibly the JVM), there isn't much we can do about it. You can try reporting it at: http://help.netscape.com/forms/bug-client.html