I have just tried to download and install PasswordSafeSWT-0.8.1-x86_64.dmg (and PasswordSafeSWT-0.8.1-x86_32.dmg) to try out the new version of Java Password Safe 0.8.1.
Both dmg disk images return the following error when I try to open (double-click) the application PasswordSafeSWT contained inside the disk image on Mac OS X 10.9.1 Mavericks:
"PasswordSafeSWT" is damaged and can't be opened. You should eject the disk image.
The icon contained in the disk image cannot be dragged and dropped in the application folder either for normal installation.
Please consider recreating the disk images to allow proper installation.