Problems with Yum FC6

Hi All,

I'm trying to do a yum update, but when I do yum download all the
goodies to install but then spits out this message


Transaction Check Error:   file /usr/lib/libxvidcore.so.4.1 from install
of xvidcore-1.1.2-1.lvn6 conflicts with file from package
libxvidcore4-1.1.0-8.rhfc5.at
  file /usr/lib/libmpeg2.so.0.0.0 from install of mpeg2dec-0.4.1-2.lvn6
conflicts with file from package libmpeg2_0-0.4.0b-1.rhfc5.at
  file /usr/lib/libmpeg2convert.so.0.0.0 from install of
mpeg2dec-0.4.1-2.lvn6 conflicts with file from package
libmpeg2convert0-0.4.0b-1.rhfc5.at

How do I find the packages that need to be removed to allow the update?

Cheers,
Chris