Is there any other filter that you can apply to reduce the flicker on text and graphics when the edges will not stop shaking after you apply "Reduce Interlace Flicker"?
If you're using very high stills, you can add a touch of blur too. Search the forums for a post from Farss on this subject, he did a lot of work to find a few workarounds, but the bottom line is, you're tremendously compressing a high rez image, and it doesn't work all that well.
If this is text generated within Vegas you shouldn't be getting any flicker, certainly on the internal preview it should be rock solid. If it's Vegas generated text, it looks OK on the internal preview but has problems on a typical TV it could be because you're using illegal colors or bad combinations of colors. Adjoining colors should come from as close to the same side of the color wheel as possible. Another trick that'll help a bit is a TINY amount of soft outline thats halfway between the two adjoining colors.
If its hi res stuff from outside of Vegas then do as SPOT suggested, I did a lot of work on this.
I'm really not a big hardcore user of titles (usually pretty straight, white letters on that side) but couldn't there be a "broadcast approved" colors switch somewhere in the text generator? A little bit like these "web safe" color switches in graphics programs which pops you up a window with colors narrowed down to the choices you got?
Too complicated to design (science fiction)?