Comment 7 for bug 1049450

Reproducible with xfce4-panel 4.10.0-1ubuntu2 under Quantal.
Set panel autohide=true.

*Click "Action Buttons" (as default it is in right top corner and label is your (login) name)
 -menu opens
*Click button again to cancel Menu.
OR
*Click somewhere else to hide Menu.
OR
*Select some entry from Menu (suspend/hibernate/lock screen)

-> Panel is not hiding anymore.
---
Workaround: run
xfce4-panel -r &
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Upstream bug (with patch):
https://bugzilla.xfce.org/show_bug.cgi?id=8960

Which I got working:
apt-get source xfce4-panel
sudo apt-get build-dep xfce4-panel
cd xfce4-panel
wget https://bugzilla.xfce.org/attachment.cgi?id=4661
patch -p1 < attachment.cgi\?id\=4661
rm attachment.cgi\?id\=4661
dpkg-source --commit
fakeroot dpkg-buildpackage
sudo dpkg -i ../xfce4-panel_4.10.0-1ubuntu2_*.deb
xfce4-panel -r &