duplicate rpm

[L]

Hi,
my system is F9 X86_64, updated. I found there are duplicate rpms in my
system eg

yum-3.2.19-3.fc9.noarch
yum-3.2.14-10.fc9.noarch

openldap-2.4.10-2.fc9.x86_64
openldap-2.4.8-3.fc9.x86_64

It seems ok to remove old version. I suspect there are more duplicates. How
to identify them?

thanks
 Y
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