SP4: HTTP compression broken

Hi,

I have the following problem with Win2k SP4: In the IIS properties dialogs I
have enabled the content compression options for apllicationsfiles and
static files. I have also an CGI-exe which does compress its content itself
and adding the deflate Content-Encoding header. This has worked very well
until the installation of SP4. Now it looks as IIS does again compress my
already compressed data and so the client browser does only display
unreadable chars. (the CGi-exe encrypted data)

The correct HTTP Header as it was before SP4 looked like this:
Server: Microsoft-IIS/5.0
Date: Mon, 30 Jun 2003 14:29:32 GMT
Connection: close
Content-Encoding: deflate
Content-Type: text/html
Content-Length: 1018
Content:


Now with SP4 I get this headers:
Server: Microsoft-IIS/5.0
Date: Mon, 30 Jun 2003 14:15:32 GMT
Connection: close
Content-Type: text/html
Content:
Content-Encoding: gzip
Transfer-Encoding: chunked
Expires: Wed, 01 Jan 1997 12:00:00 GMT
Cache-Control: max-age=86400
Vary: Accept-Encoding


As you can see it has completely incorrect headers. It has now gzib
compression and also the Treansferencoding has changed. I can solve this
problem by disable the application compression in IIS but why has it worked
before SP4?

This looks like a serious IIS bug to me. Any comments?

Bye
Rolf