This is something I have not really seen before.
The interference shown in this screen clipping should not be shown as I am certain that the parts are drawn correctly. SolidWorks is rendering the upper part incorrectly.
This part is a thin extrusion with an 840 inch radius, 3/8" thick.
I tried modeling it using a standard extrusion and ran into the same problem.
Interestingly, I added a cut to the part and it was suddenly rendered correctly...?
Anyone know if there is anthing I can do to fix this as SolidWorks is showing alot of interference that should not be shown.