Hello,
a couple of days ago, this package requested upgrade. It downloaded fine, yet during installation a message appeared and then installation was aborted. I tried to uninstall it and it was mentioned that gromacs should be uninstalled as well. I uninstalled gromacs, made some other upgrades in the meantime, rebooted, tried to reinstall gromacs, it requested the sse4.2-support package again, which was installed fine in the end.
Regards