mysterious redirect.html when first loading bb client in IE 6

Im getting this error on IE, which is what the client is using, unfortunately.
This is the request stack trace when logging into our web app:

IE v6
1) login.jsf;jsessionid=asdfhkjasdhflksadf......
2) another jsf file
3) /3_3_1/bpc/boot.js
4) local CSS file
5) /3_3_1/redirect.html?e=1 (redirect.html doesnt exist in the backbase dir)
6) /3_3_1/bpc/bpc_01.js
7) user is redirected to the generic IE "page cannot be displayed"

fail

Mozilla
1) login.jsf
2) another jsf file
3) local css file
4) /3_3_1/bpc/boot.js
5) /3_3_1/bpc/bpc_02.js
6) /3_3_1/bpc/dls/dls_02.js

success

Thank you in advance for any help or direction.

JP