I too have this problem.
This appears to be a duplicate of another bug report, Bug #1293740
I read here( http://ubuntuforums.org/showthread.php?t=2225150 ) that
"Shade no longer works with unity because the unity plugin for compiz has taken over the drawing of window decorations. Still works in a non unity session where the window decorations plugin is enabled. "
I too have this problem.
This appears to be a duplicate of another bug report, Bug #1293740
I read here( http:// ubuntuforums. org/showthread. php?t=2225150 ) that
"Shade no longer works with unity because the unity plugin for compiz
has taken over the drawing of window decorations.
Still works in a non unity session where the window decorations plugin is enabled. "