A simple quick test shows that they are working:
/window -d +L @test
The -d switch opens the window @test on the desktop. The +L switch (From the 3rd list of params) means the window won't open on the taskbar. If you type just /window -d @test you will see it does appear on the taskbar.
Make sure you prefix the 3rd params with a + symbol not a - symbol.
Regards,
