How about a trailing / after okstudio?
VirtualHost 123.45.678.9
ServerName www.mydomaine.com.au
ProxyPass / http://demon.server.com.au:8080/okstudio
ProxyPassReverse / http://demon.server.com.au:8080/okstudio
/VirtualHost
NameVirtualHost 123.45.678.9
VirtualHost 123.45.678.9
ServerName www.mydomaine.com.au
ProxyPass / http://demon.server.com.au:8080/okstudio/
ProxyPassReverse / http://demon.server.com.au:8080/okstudio/
/VirtualHost
This is the setup you want. Note the trailing /'s. It means that
anything sent