I noticed that when I render a dvd from hdv canon xha1 24p footage to dvd architect the default widescreen template shows the pixel format as 1.212. The problem is that my project properties show the pixel format of my footage as 1.333. I do not see a way to change this when I open preferences.
I am currently using vegas 11 build 521.
That's because your xha1 footage is 1440x1080 anamorphic, 1.333 PAR. On the other hand, DVD NTSC widescreen is 720x480, 1.2121 PAR.
If there are very slight black borders in the dvd widescreen output, tick "stretch to fill output" when you render.