Vertical separators broken in LR 5.2 Windows 7

Vertical separators created by viewFactory:separator() are broken in LR 5.2 (Windows 7 64-bit). Perhaps someone else could run the sample code on Mac OS? (My old Mac can't run LR 5.) See here for details and sample code:

http://feedback.photoshop.com/photoshop_family/topics/sdk_vertical_separators_broken_in_lr _5_2_windows?rfm=1