I have dvd playback working, but...

apt-get upgrade wants to upgrade libdvdcss2, I currently have version 1.2.5-1 installed.

The upgraded version breaks my dvd playback for some reason. So every time I do an update, I have to manually downgrade libdvdcss2 back to version 1.2.5-1.

Is there any way I can instruct apt-get to ignore the updates to libdvdcss2?