Recently, I've upgraded to 11.04 beta 2. All looking fine, until, after installing some usual distribution updates, unity's sidebar doesn't show any application icons, only a black panel. Hovering and left-clicking work normally. Is this a bug or just a temporary issue?
closed as off topic by Marco Ceppi♦ Feb 15 '12 at 4:05
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looks like this is a bug. check out bug report - 762478
try in terminal or alt+f2
the reset icons one will reset the icons to default ones.
I was able to get the sidebar back to normal after a fashion. I'm not quite sure what the lucky step was, but I'll tell what I did in case it might be useful for someone else:
Upon login I had the default Unity bar with normal icons showing, though I lost my compiz settings, but thats better than having to reinstall.
I was able to re-import my old ccsm profile without the bar going black as well.
perhaps some residual configs are conflicting. try this on a terminal:
After installation is finished logout and log back in. Hope that helps