Relocation broken on 4.3.3-18 ?

Relocation appear not to work on RPM 4.3.3-18 .

I have Prefix: set to /opt/myfiles

All files in the RPM are in /opt/myfiles/myprog

When I pass the --prefix flag and try to install to 
/usr/local/opt/myfiles/ for example, it still installs in the default 
directory

Also if I query  rpm -qp --queryformat '%{prefix}\n' or {defaultprefix} 
I get an incorrect format error. If I query {name}, [release}, 
{version}, etc. the query comes backs correctly.