The taskbars pane (button) of RocksNDiamonds setup from rapps erroneously does not get into pressed state when starting the app. As a consequence minimize/maximize-alternation invoked via taskbar pane later does not work properly.
This bug does happen with all of those:
0.4.13-RC-46-gbb9997c + explorer-workaround of DougLyons from
0.4.13-RC-46-gbb9997c + patch of blueghost from
0.4.14-dev-1012-g820dbfc master head vanilla
I suspect the bug is in WIN32SS.
2k3sp2_RnD_ok.webm does properly show the pressed pane and can even minimize/maximize-alternate when clicking the taskbar button repeatedly.