Aliasing in Preview Window
 

I recently purchased the canon c100. When I put the footage on the timeline, there is significant aliasing in preview window. Its not in the original footage nor is it in the exported footage. I know the progressive files are wrapped in an interlaced container put I am changing the properties to let Vegas know that the files are progressive. I'm using Vegas Pro 12. Its only happening with the C100 files. Any thoughts?