I note that the titler VEGAS Titles & Text doesn't works with some font. Here a print screen:
As you can see, the font Bank Gothic Medium BT is selected, in the edit panel of VEGAS Titles & Text, the shape of the font has changed, but not in the Video preview.
This happen with many fonts eg: .atari-kids, AFLFontpespaye, Akbar Plain, Alien Sans Latin Basic, Berylium-regular, BudBird, Caladea, Calibri, Capture it, and many more...
It's too bad, because VEGAS Titles & Text, it's a simple and quick titler.