Running 4.5 Beta 5; Snow Leopard.
I browsed through the forum, and might have missed this. If I set the default font scaling above 100% it affects other fonts that haven't been affected in the past. The preferences pane for one, the other one I'm noticing is the Copy Bible Verses drop downs and the font over the buttons. Still functions as expected, just a visual thing.
Further observation, the biblical text in the copy window does not change size, the reference and the section title do.