I think it's because you need some fonts installed.

I'll go check my old PM's I believe I had the same problem.

EDIT: I checked. You need the fontfix, but BC's link he gave me was protected, so there's no use in PMing either of you with it. PM him and ask for the fontfix, I believe it helped my text somewhat when I was using RM2k3.

Unless you use RM2k, which I skipped, so I have no help to offer. Sorry.