xftaskbar4 doesn't listen to removal of _NET_WM_STATE_SKIP_TASKBAR?

[Brian J. Tarricone]

hmm, i'm writing that systray icon for xfmedia that jasper suggested, 
and i noticed that if i use gtk_window_set_skip_taskbar_hint(), passing 
it TRUE, the window disappears from the taskbar, as it should.  but if i 
later call it again and pass it FALSE, the taskbar doesn't show a button 
for the window again.  i've checked with xprop, and the property is 
indeed being removed.

i've attached a quick testcase that illustrates the problem.  any 
ideas?  am i doing something wrong?

    -brian
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