I'm the maintainer of the MSCIM package.
Well, the last update is mainly for:
1. Make less changes to system. The /etc/event.d/scim is removed, and the hildon im is still kept in the gtk.immdoule file. But use export GTK_IM_MODULE=scim to set MSCIM as default input method
2. Support input in Qt application. For that, you need to install mscim-bridge-client-qt4. The MSCIM doesn't work really well under Qt apps, that you could only press Fn and other keys together to input the blue characters.

Notice: After update to latest package, you need reboot to make MSCIM work again. If possible, I suggest you apt-get purge mscim first, and reinstall mscim.