Hough transform change in IP9?

I noticed the Hough transform behaves differently in IP9 compared to IP8. In IP8, horizontal lines would appear in the image center. They now appear at the window top/bottom in IP9.

Unfortunately, this breaks some of my code. Is there a compatibility flag that I missed that could save my old code?

There was one change in the code between IP8 and IP9 to fix the reference rotation.  Please contact support@wavemetrics.com and, if possible, send an experiment that illustrates the problem.