1 Install portable mode with default options.
2 In Tools > Options > Skin, click Vitreous
Expected: dialog box changes to this skin.
Observed: dialog box messes-up:

3 Click Close
Expected: main window changes to this skin
Observed: main window goes unskinned

By some method on some OS, Peke got the expected: https://www.mediamonkey.com/forum/viewt ... 76#p503676 .
Note: This report not yet in Mantis.