Please describe the problem:
The bug appears when you have two things:

1. an auto-hiding panel
2. grouped windows in the window list therein

When you click on a grouped window list entry in the panel, it intuitively opens
a menu to choose the individual window.  Do this.  Now, the panel will not
disappear.


Steps to reproduce:
There are two related situations where the problem also occurs:

1. when you do not actually choose a window but make the menu hide by clicking
somewhere on the desktop
2. when you use the right mouse button

Actual results:
The same as for the initial situation.  I guess you can find more ways to
reproduce this faulty behavior.

Expected results:
I consider it really intuitive that the panel should disappear when the grouped
windows menu is left.

Does this happen every time?
Yes, it is 100% reproducible.

Other information:
Myself, I am using GNOME 2.8, but someone on FreeNode managed to reproduce this
problem for 2.10.  (Thank you!)

It is also documented on https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=159073