Hej!
Denna fråga är ställd även i ett annat forum, därav är den på engelska:

I have a menu that contains inherited menuitems that also draws an icon in my MDI-app and it works fine until my MDI-child-windows starts having menus of their own that is automatically merged with the MDI-Parent’s menu.

After closing ALL Child-windows the former beautiful icon-menu gets blank (OnDraw is not called).

Have anyone heard anything about this or experienced it yourself?

I think this smells like a Microsoft bug in Windows.Forms.

By the way, the implementation of icon-menuitem I used is found on:
http://www.msjogren.net/dotnet/eng/samples/dotnet_iconmenu.asp