It's most likely just different pieces of code conflicting with each other in the layout logic (due to the many, many complex different scenarios that all have to be handled combining page alignment, page scaling mode, display mode, cropped pages, zooming, panning, annotating, low quality zoom vs high quality zoom, etc, etc). I'll look into it to see if I can get it addressed for the next update. It would help to know what display mode and page scaling mode you currently have selected. Alternatively, go to Settings->Backup and Restore->Export Settings and send the .mcf file to mike@zubersoft.com so I can test with your settings.
Thanks,
Mike
Thanks,
Mike