Did you ever find a solution to your problem?
I think I've just run into the same thing.
I'm using the Yaws Erlang web server.
The Chrome browser shows the Wiki just fine.
Both Internet Explorer and Firefox are sent this blank page:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv="Content-Type"
content="text/html; charset=windows-1252"></HEAD>
<BODY></BODY></HTML>
Why is this browser dependent?