So... found a small bug. When installing DEF_INV default setting is synced tabs, which I prefer to play without. Opening the settings.swf and unticking this box (actually, opening settings.swf and editing any setting) sets all text in the pipboy to 12 p, even though it should be 18 p. I'ts slightly annoying but if it can't be fixed/worked around it's no biggie. The question is, of course, if anyone else has experienced this effect and has discovered a workaround, or if it's just my setup that doesn't like me.