[andrzej@bolitar openoffice]$ rpm --checksig * openoffice.org-1.1.3-6.5.0.fc3.i386.rpm: (sha1) dsa sha1 MD5 GPG NIE DOBRZE openoffice.org-i18n-1.1.3-6.5.0.fc3.i386.rpm: (sha1) dsa sha1 MD5 GPG NIE DOBRZE openoffice.org-libs-1.1.3-6.5.0.fc3.i386.rpm: (sha1) dsa sha1 MD5 GPG NIE DOBRZE
NIE DOBRZE = not good
If "rpm --checksig --nosignature *" also reports this, your downloads are definitely bad and you'll need to re-download them.
Paul.