I handle the creation of production files for a sign company. We recently began work on a very large scale monument with a 44' radius top. I used INTERSECT to create the panels to be routed for that portion only to constantly come up with an incorrect size (top to bottom) on the radius of each panel. On closer inspection I realized that whenever I used INTERSECT to create the panel for some reason it creates a flawed section off by .013" all the way across the shape. My understanding has always been that INTERSECT is supposed to create an exact section from the two overlapping shapes selected but that is now apparently not the case. This seems to only be the case with very large scale vectors in 1:1. It works perfectly with small scale shapes and creates a section exactly the size of the overlapped sections...but the larger the shape the greater the size discrepancy. Has anyone else encountered this issue and/or know a fix for it?
Please understand that I was not dismissing your concern. As a long-time user of CorelDraw, I think that I have become a bit jaded when it comes to hoping that bugs will get (1) noticed by Corel, (2) taken seriously by them, and (3) fixed by them.
I would suggest that you try to find a way to officially report this issue to them. If you get an answer about this, then it would be great for you to post that information back to this thread. I'm interested in the answer, and questions/answers in these forums are a great resource for others in the future.
Although this is not exactly the same thing, you might find some of the observations in this thread interesting. Smaller objects with small inaccuracies - but inaccuracies nonetheless.