Yes, but you are running 1.3.27. What that has to do with the Apache2.1 mod_proxy?
Nope, the version number pasted is in the 404 reply that comes from the bitmover site. To clarify what I'm currently running:
/usr/local/apache/bin/httpsd -V Server version: Apache/2.1.3-dev
OK then :). Since it's prefork we don't have a threading problem. Can you paste some light and post the Proxy config directives. It will help.
Cheers, Mladen.