yum check checks the local rpmdb database and displays information about any problem it may find.
# yum check
...
ImageMagick-c++-6.5.4.7-3.fc12.i686 has missing requires of ImageMagick = ('0', '6.5.4.7', '3.fc12')
ImageMagick-perl-6.5.4.7-3.fc12.i686 has missing requires of ImageMagick = ('0', '6.5.4.7', '3.fc12')
abrt-1.1.1-2.fc12.i686 has missing requires of librpm.so.0
abrt-1.1.1-2.fc12.i686 has missing requires of librpmio.so.0
baekmuk-ttf-batang-fonts-2.2-22.fc12.noarch has missing requires of baekmuk-ttf-fonts-common = ('0', '2.2', '22.fc12')
baekmuk-ttf-dotum-fonts-2.2-22.fc12.noarch has missing requires of baekmuk-ttf-fonts-common = ('0', '2.2', '22.fc12')
baekmuk-ttf-fonts-ghostscript-2.2-22.fc12.noarch has missing requires of baekmuk-ttf-gulim-fonts = ('0', '2.2', '22.fc12')