rpm-4.4.2.3-2.fc9.x86_64:

    # rpm -q foo
    package foo is not installed
    # rpm -e foo.i386
    error: package foo.i386 is not installed
    # echo $?
    1

The above is fine, but:

    # rpm -q firefox
    firefox-3.0.1-1.fc9.x86_64
    # rpm -e firefox.i386
    # echo $?
    0

I would have expected a "error: package firefox.i386 is not installed" error message and exit status 1.  rpm -q works as expected though:

    # rpm -q firefox.i386
    package firefox.i386 is not installed