I tried to install 1.4.1 on PR1.2 but it said "installation interrupted" at the end of the installation. I clicked retry once but it's the same. By the way, I tried to install the mm/dd/yyyy version. Not yet try the dd/mm/yyyy if it has the same problem for me.

This is the first time I tried to install ipsmagic.

Edit: same problem for me with both mm/dd/yyyy and dd/mm/yyyy version.