Proxy decodes URLs

[v0id null <v0idnull@xxxxxxxxx>]

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