about QM3 Some suggestions

[Gintaras]

With your Layout.xml the splitter cursor is displayed normally on my PC. If your mouse device and settings are OK or can't be changed, maybe it is yet another WPF quirk that occurs on some computers. Exit LA and edit the xml file:

<document name="documents" z="645*" s="1" captionAt="Right" />
->
<document name="documents" z="645*" s="4" captionAt="Right" />