Because there's a feature of "Vista Boost" included in Orbiter Beta for some time now, which disables font smoothing by default.Orbiter 2012 + P2 change fonts. I don't know why.
Thanks, orb. It solved the issue in beta installation. In 100830 I had VistaBoost module enabled. After I deselected it fonts display smooth. Now it's interesting to compare the performance with smoothing on and off. I hope there is not much difference.Orbiter Launchpad -> Extra -> Debugging options -> Performance options -> Font smoothing: uncheck the "Disable font smoothing while Orbiter is running" checkbox.
Do you use VistaBoost in Orbiter Beta?Every time I exist the beta version, I have to manually reset the clear type by enable the tick box.