Hi, ShiroiKuma,
I recompiled Portabase (with Metakit and Beecrypt), and it seems to work both in matchbox and KDE 3.5. See if it is also working for you. Attached is the stripped binary together with libmk4.so (seems to be required but you may verify that)/ Sorry I haven't packaged them yet, but I will do so if you also find it okay.