Interlacing destroys color

[old_tv_nut]

I don't understand how you are looking at both interlace and progressive on a roundie, which can only display interlace?

Edit: oops - i see now you aren't talking about 525 (480) progressive, but 240 progressive.

I'm surprised that you see any color difference, although you could see some inter-line flicker (or "twitter") in the interlaced case.