When you change the default fixed and or variable sized font "size" via the two pulldowns and click OK, there are a couple of problems: 1. The font doesn't change immediately (you have to redraw). 2. If you go back into the font section, the font size is always reset to 8 (i.e. it doesn't report it's current settings).

This has been fixed in newer builds. *** This bug has been marked as a duplicate of 24830 ***

verified.