Low priority PJSR layout issue: GroupBox title layout is off slightly in the vertical direction relative to the frame line. See pic of 1171 vs 1123 Win7. (QSS: Segoe UI 9pt low-res).
Also, with GroupBox margin 6, spacing 6, (same in 1123 and 1171) the vertical spacing between the frame line and the first item (Label, Edit in HSizer) has increased on Win7. (Not shown in pics). groupBox.sizer.addSpacing(-6) makes 1171 look like 1123.
Thanks,
Mike