Apache proxy serving M$-junk

Hi,

the online update function on win2000 doesn't seem to work over an 
apache proxy. I've looked at the logs and the only thing that's 
different between what is served directly an what is served by te proxy 
is that the proxy strips off the Content-Length and Transfer-Encoding 
headers. From the sources I gather this is done to not break the 
keep-alive code, but for IE clients the keepalive is turned off anyway ( 
from the httpd.conf ). Is there any harm in sending these headers 
through when the keep-alive is off ?

Thanks !

Peter.