I use 2 RH6.2 i386 boxes. One is a production server, the other a test 
machine. 

On the test machine, I recently upgrade to rpm-4.0.2 painlessly.

Using rpm-4.0.2, I upgrade some packages including ucd-snmp-4.1.1.1-3 
without any problem. 

I used to rebuild some packages on my test machine to install them on the 
production server (both are HP PIII PC). 

Using rpm-4.0.2 with --rebuild option on BOTH machines, I only get the 
option list : 

[fhermann@obelix test-bug-rpm]$ file *
openssh-2.5.2p2-1.7.2.src.rpm: RPM v4 src i386 openssh-2.5.2p2-1.7.2
xntp3-5.93-15.src.rpm:         RPM v4 src i386 xntp3-5.93-15
[fhermann@obelix test-bug-rpm]$ rpm --rebuild xntp3-5.93-15.src.rpm 
RPM version 4.0.2
Copyright (C) 1998-2000 - Red Hat, Inc.
This program may be freely redistributed under the terms of the GNU GPL

Usage: rpm {--help}
       rpm {--version}
       rpm {--initdb}   [--dbpath <dir>]
(snip long list of options)
[fhermann@obelix test-bug-rpm]$

I try to use the "--target" option, withour any result. 

if I install the SRC package and try to build it using the -b options, the 
build work correctly


If I downgrade to rpm3, I can rebuild as usual.