InputManagers in Leopard ↩
Something not mentioned in those tips is that not only the input managers themselves but also the InputManagers directory must be owned by root and only writable by the owner (g-w).
These two commands did the trick for me:
$ sudo chown -R root:wheel /Library/InputManagers $ sudo chmod -R go-w /Library/InputManagers
By the way, does anyone know what the '@'-sign after the rights in a directory listing means? As in
drwxr-xr-x@ 11 root wheel 374B 11 Sep 04:25 SafariBlock?