Comment 5 for bug 490983

You should know that the smart package manager succeeds in installing the package even with this (unless the fix got actually uploaded in the last few minutes). You should also know that the smart package manager installs mysqlclient15-devel for some reason:

Installing packages (3):
  mysql51-5.1.41-1.ius.el5@x86_64
    Requires:
      mysql51-5.1.41-1.ius.el5@x86_64 (installed)
      mysqlclient15-devel-5.0.85-1.ius.el5@x86_64 (installed)
      mysqlclient15-5.0.85-1.ius.el5@x86_64 (installed)
    Required By:
      mysql51-5.1.41-1.ius.el5@x86_64 (installed)
  mysqlclient15-5.0.85-1.ius.el5@x86_64
    Required By:
      mysqlclient15-devel-5.0.85-1.ius.el5@x86_64 (installed)
      mysql51-5.1.41-1.ius.el5@x86_64 (installed)
  mysqlclient15-devel-5.0.85-1.ius.el5@x86_64
    Requires:
      mysqlclient15-5.0.85-1.ius.el5@x86_64 (installed)
    Required By:
      mysql51-5.1.41-1.ius.el5@x86_64 (installed)

It makes NO SENSE to me why the mysql51 package would require the lib-devel package installed, which in turn requires the lib package installed. But at least with the smart package manager the packages are installed, erm, smartly :-)