[users@httpd] Proxy decodes URLs

[v0id null]

So lets say I have a simple Vhost:

<VirtualHost *:80>
    ServerName foobar

    # proxy a tomcat server
    ProxyPass /proxy-dir/context http://localhost:8080/context
</VirtualHost>

When I make a request to http://foobar/proxy-dir/context/username%40domain

Tomcat receives http://localhost:8080/context/username@domain

This is an invalid URL.

How can I prevent mod_proxy from urldecoding requests?

thanks,
--alex