can not get a saved attribute from session object

Hi all here,

Sorry for cross post, and I am not sure this is the proper to post my
question.

I have meet a very strange problem when I deploy our application to users. I
have 2 jsp page, first one save an attribute named "count_tmp" to session,
and in this jsp page, redirect to the second page, using the following
javascript:
self.location.href="<%=response.encodeURL("jsp2.jsp")%>";

And I retrieve the session attribute in the second jsp page, this work fine
in my company(tomcat4.1.24, jdk1.4), but when I deploy to user, the
attribute get from session will be null! and throws null exceptions!And it
seemed that not all computer will meet the error. Some computers(I mean
client computer) can work fine, some will fire the error.

Do you meet the problem too? How can you solve it ?

I try to post it here, because ONLY the IE brower will fire the error,
netscape will not. And I found some bug report on microsoft website, it
seemed this is a bug for IE6.0, but I can not find any patch to solve it.
Could you help me?

Appreciate for any help.

lichunlin
China