let me be honest but i didnt really get what is it that ur trying to say !!!
is it that u dont get access denied with browsers other than netscape ? if so than its definately strange problem and one that i havent seen so far !!!
or is it that ur able to browse from the linux machine but not from other clients ? if so than its because the ACL allows ur own ip but not others ( its default !) ......
what's the exact situation ?